claude-code - 💡(How to fix) Fix [Bug] TUI: MCP list cursor doesn't scroll when reaching bottom of visible area [1 comments, 2 participants]

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/chris/.local/share/claude/versions/2.1.110 (expected in multi-process scenarios)\n at kg_ (/$bunfs/root/src/entrypoints/cli.js:2751:2153)\n at jt6 (/$bunfs/root/src/entrypoints/cli.js:2751:1233)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T09:28:44.677Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server greptile invalid: Missing environment variables: GREPTILE_API_KEY\n at hwH (/$bunfs/root/src/entrypoints/cli.js:2751:30220)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T09:28:44.861Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server sourcegraph invalid: Missing environment variables: SOURCEGRAPH_ENDPOINT, SOURCEGRAPH_ACCESS_TOKEN\n at hwH (/$bunfs/root/src/entrypoints/cli.js:2751:30220)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T09:28:44.861Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server greptile invalid: Missing environment variables: GREPTILE_API_KEY\n at hwH (/$bunfs/root/src/entrypoints/cli.js:2751:30220)\n at async E (/$bunfs/root/src/entrypoints/cli.js:6137:10916)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T09:28:45.907Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server sourcegraph invalid: Missing environment variables: SOURCEGRAPH_ENDPOINT, SOURCEGRAPH_ACCESS_TOKEN\n at hwH (/$bunfs/root/src/entrypoints/cli.js:2751:30220)\n at async E (/$bunfs/root/src/entrypoints/cli.js:6137:10916)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T09:28:45.907Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server greptile invalid: Missing environment variables: GREPTILE_API_KEY\n at hwH (/$bunfs/root/src/entrypoints/cli.js:2751:30220)\n at async v (/$bunfs/root/src/entrypoints/cli.js:6137:11711)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T09:28:45.912Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server sourcegraph invalid: Missing environment variables: SOURCEGRAPH_ENDPOINT, SOURCEGRAPH_ACCESS_TOKEN\n at hwH (/$bunfs/root/src/entrypoints/cli.js:2751:30220)\n at async v (/$bunfs/root/src/entrypoints/cli.js:6137:11711)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T09:28:45.912Z"}]

TL;DR

The issue can be mitigated by setting the required environment variables for the MCP servers, such as GREPTILE_API_KEY, SOURCEGRAPH_ENDPOINT, and SOURCEGRAPH_ACCESS_TOKEN.

Guidance

• The errors indicate that the MCP servers (greptile and sourcegraph) are missing required environment variables, which is likely causing the scrolling issue in TUI mode.
• To verify, check the environment variables set in the terminal or tmux session where the command is being run.
• Set the required environment variables for the MCP servers, for example: export GREPTILE_API_KEY=your_api_key and export SOURCEGRAPH_ENDPOINT=your_endpoint and export SOURCEGRAPH_ACCESS_TOKEN=your_token.
• If the issue persists, try checking the version of the software and ensuring it is up to date, as the issue may be related to a known bug in the version being used (2.1.110).

Notes

The provided errors suggest that the issue is related to missing environment variables, but it is unclear if this is the root cause of the scrolling issue in TUI mode. Further investigation may be needed to determine the exact cause.

Recommendation

Apply workaround: set the required environment variables for the MCP servers, as this is a clear and actionable step that can be taken to potentially resolve the issue.