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Unable to add remote mcp server in Claude Desktop #799

@marcoscale98

Description

@marcoscale98

Describe the bug

Guthub Remote MCP Server doesn't work with Claude Desktop. It stucked in the browser for the Oauth

Image

Affected version

  • Windows (Firefox)
  • MacOS (Safari and Chrome)

Steps to reproduce the behavior

  1. Add custom connector via Claude
  2. "Connect"
  3. Open Browser -> black window

Logs

2025-08-01 01:38:40 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:38:40 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:38:40 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:38:40 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:38:40 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:38:40 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:38:40 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:38:40 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:38:40 [warn] An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.
2025-08-01 01:38:42 [warn] [Intercom] The App ID in your code snippet has not been set. Set it to your App ID found in settings to complete installation: https://app.intercom.com/a/apps/_/settings/web
2025-08-01 01:39:04 [error] Failed to connect to remote MCP server GitHub MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:39:04 [error] Failed to connect to remote MCP server GitHub MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:39:04 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:39:04 [error] Failed to connect to remote MCP server Atlassian: McpError: MCP error -32000: Connection closed
2025-08-01 01:39:04 [error] Failed to connect to remote MCP server Atlassian: McpError: MCP error -32000: Connection closed
2025-08-01 01:39:09 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:39:19 [error] Failed to connect to remote MCP server GitHub MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:39:19 [error] Failed to connect to remote MCP server Atlassian: McpError: MCP error -32000: Connection closed
2025-08-01 01:40:32 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:40:32 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:40:32 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:40:32 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:40:32 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:40:32 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:40:32 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:40:32 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:40:32 [warn] An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.
2025-08-01 01:40:32 [warn] Found 1 service worker(s), which are no longer used. Unregistering.
2025-08-01 01:40:34 [error] Failed to connect to remote MCP server GitHub MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:40:34 [error] Failed to connect to remote MCP server Atlassian: McpError: MCP error -32000: Connection closed
2025-08-01 01:40:39 [warn] Warning: Missing `Description` or `aria-describedby={undefined}` for {DialogContent}.
2025-08-01 01:40:41 [error] Failed to connect to remote MCP server Atlassian: McpError: MCP error -32000: Connection closed
2025-08-01 01:40:43 [warn] Warning: Missing `Description` or `aria-describedby={undefined}` for {DialogContent}.
2025-08-01 01:40:47 [warn] Warning: Missing `Description` or `aria-describedby={undefined}` for {DialogContent}.
2025-08-01 01:40:51 [warn] Warning: Missing `Description` or `aria-describedby={undefined}` for {DialogContent}.
2025-08-01 01:41:04 [error] Failed to connect to remote MCP server Github MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:41:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:41:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:41:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:41:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:41:12 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:41:12 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:41:12 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:41:12 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:41:12 [warn] An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.
2025-08-01 01:41:12 [error] Uncaught Error: Minified React error #418; visit https://react.dev/errors/418?args[]=text&args[]= for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
2025-08-01 01:41:12 [warn] Found 1 service worker(s), which are no longer used. Unregistering.
2025-08-01 01:41:12 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:41:13 [error] Failed to connect to remote MCP server Github MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:41:13 [error] Failed to connect to remote MCP server Github MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:41:17 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:41:24 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:41:24 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:41:24 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:41:24 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:41:24 [warn] Found 1 service worker(s), which are no longer used. Unregistering.
2025-08-01 01:41:24 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:41:24 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:41:24 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:41:24 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:41:24 [warn] An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.
2025-08-01 01:41:24 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:41:25 [error] Failed to connect to remote MCP server Github MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:41:29 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:47:20 [warn] Unexpected <pre> in markdown that did not contain <code> with single string child
2025-08-01 01:47:23 [warn] Unexpected <pre> in markdown that did not contain <code> with single string child
2025-08-01 01:47:23 [warn] Unexpected <pre> in markdown that did not contain <code> with single string child
2025-08-01 01:50:05 [warn] Unexpected <pre> in markdown that did not contain <code> with single string child
2025-08-01 01:50:05 [warn] Unexpected <pre> in markdown that did not contain <code> with single string child
2025-08-01 01:50:09 [warn] Unexpected <pre> in markdown that did not contain <code> with single string child
2025-08-01 01:50:09 [warn] Unexpected <pre> in markdown that did not contain <code> with single string child
2025-08-01 01:52:38 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:52:38 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:52:38 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:52:38 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:52:39 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:52:39 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:52:39 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:52:39 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:52:39 [warn] An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.
2025-08-01 01:52:39 [warn] Found 1 service worker(s), which are no longer used. Unregistering.
2025-08-01 01:52:40 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:52:40 [error] Failed to connect to remote MCP server Github MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:52:44 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:53:38 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:53:38 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:53:38 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:53:38 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:53:39 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:53:39 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:53:39 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:53:39 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:53:39 [warn] An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.
2025-08-01 01:53:39 [warn] Found 1 service worker(s), which are no longer used. Unregistering.
2025-08-01 01:53:40 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:53:40 [error] Failed to connect to remote MCP server Github MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:53:45 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:53:48 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:53:48 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:53:48 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:53:48 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:53:49 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:53:49 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:53:49 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:53:49 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:53:49 [warn] An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.
2025-08-01 01:53:49 [warn] Found 1 service worker(s), which are no longer used. Unregistering.
2025-08-01 01:53:49 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:53:50 [error] Failed to connect to remote MCP server Github MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:53:54 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:55:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:55:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:55:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:55:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:55:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:55:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:55:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:55:11 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:55:11 [warn] An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.
2025-08-01 01:55:11 [warn] Found 1 service worker(s), which are no longer used. Unregistering.
2025-08-01 01:55:13 [error] Failed to connect to remote MCP server Github MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:55:13 [error] Failed to connect to remote MCP server Github MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:55:13 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:55:18 [warn]   WARN  [Statsig] Failed to flush events.
2025-08-01 01:55:19 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:55:23 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:55:23 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:55:23 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:55:23 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:55:23 [error] Uncaught Error: Minified React error #418; visit https://react.dev/errors/418?args[]=text&args[]= for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
2025-08-01 01:55:23 [warn] Found 1 service worker(s), which are no longer used. Unregistering.
2025-08-01 01:55:23 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:55:23 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:55:23 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:55:23 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:55:23 [warn] An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.
2025-08-01 01:55:23 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:55:24 [error] Failed to connect to remote MCP server Github MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:55:29 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:56:36 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:56:36 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:56:36 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:56:36 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:56:37 [error] Uncaught Error: Minified React error #418; visit https://react.dev/errors/418?args[]=text&args[]= for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
2025-08-01 01:56:37 [warn] Found 1 service worker(s), which are no longer used. Unregistering.
2025-08-01 01:56:37 [warn] Error with Permissions-Policy header: Unrecognized feature: 'ambient-light-sensor'.
2025-08-01 01:56:37 [warn] Error with Permissions-Policy header: Unrecognized feature: 'document-domain'.
2025-08-01 01:56:37 [warn] Error with Permissions-Policy header: Unrecognized feature: 'speaker-selection'.
2025-08-01 01:56:37 [warn] Error with Permissions-Policy header: Unrecognized feature: 'web-share'.
2025-08-01 01:56:37 [warn] An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.
2025-08-01 01:56:37 [error] Potential permissions policy violation: payment is not allowed in this document.
2025-08-01 01:56:38 [error] Failed to connect to remote MCP server Github MCP: McpError: MCP error -32000: Connection closed
2025-08-01 01:56:42 [error] Potential permissions policy violation: payment is not allowed in this document.

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