claude-code - 💡(How to fix) Fix [Bug] Ultra Plan execution failures - repeated failures across multiple attempts [1 comments, 2 participants]

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/jdrumgoole/.local/share/claude/versions/2.1.92 (expected in multi-process scenarios)\n at im_ (/$bunfs/root/src/entrypoints/cli.js:1884:2153)\n at An6 (/$bunfs/root/src/entrypoints/cli.js:1884:1233)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-06T14:21:54.260Z"},{"error":"MaxFileReadTokenExceededError: File content (12129 tokens) exceeds maximum allowed tokens (10000). Use offset and limit parameters to read specific portions of the file, or search for specific content instead of reading the whole file.\n at d$7 (/$bunfs/root/src/entrypoints/cli.js:4294:13161)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-06T14:41:16.843Z"},{"error":"McpToolCallError: ### Error\nError: Ref e162 not found in the current page snapshot. Try capturing new snapshot.\n at Ov9 (/$bunfs/root/src/entrypoints/cli.js:1566:63)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-06T15:53:28.465Z"},{"error":"McpToolCallError: ### Error\nError: Ref e152 not found in the current page snapshot. Try capturing new snapshot.\n at Ov9 (/$bunfs/root/src/entrypoints/cli.js:1566:63)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-06T15:53:33.567Z"},{"error":"McpToolCallError: ### Error\n[\n {\n "expected": "string",\n "code": "invalid_type",\n "path": [\n "ref"\n ],\n "message": "Invalid input: expected string, received undefined"\n }\n]\n at Ov9 (/$bunfs/root/src/entrypoints/cli.js:1566:63)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-06T15:54:34.636Z"},{"error":"Error: File does not exist. Note: your current working directory is /Users/jdrumgoole/GIT/winebox.\n at call (/$bunfs/root/src/entrypoints/cli.js:4303:7610)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-06T21:30:33.082Z"},{"error":"McpToolCallError: ### Error\nError: browserBackend.callTool: Target page, context or browser has been closed\n at Ov9 (/$bunfs/root/src/entrypoints/cli.js:1566:63)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-07T07:25:31.025Z"},{"error":"McpToolCallError: ### Error\nError: browserBackend.callTool: Target page, context or browser has been closed\n at Ov9 (/$bunfs/root/src/entrypoints/cli.js:1566:63)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-07T07:25:42.251Z"},{"error":"McpToolCallError: ### Error\nError: browserBackend.callTool: Target page, context or browser has been closed\n at Ov9 (/$bunfs/root/src/entrypoints/cli.js:1566:63)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-07T07:26:08.213Z"},{"error":"McpToolCallError: ### Error\nError: browserBackend.callTool: Target page, context or browser has been closed\n at Ov9 (/$bunfs/root/src/entrypoints/cli.js:1566:63)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-07T07:28:47.182Z"},{"error":"McpToolCallError: ### Error\nError: browserBackend.callTool: Target page, context or browser has been closed\n at Ov9 (/$bunfs/root/src/entrypoints/cli.js:1566:63)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-07T07:28:52.151Z"},{"error":"McpToolCallError: ### Error\nError: browserBackend.callTool: Target page, context or browser has been closed\n at Ov9 (/$bunfs/root/src/entrypoints/cli.js:1566:63)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-07T07:29:00.145Z"},{"error":"Error: Request was aborted.\n at makeRequest (/$bunfs/root/src/entrypoints/cli.js:50:3447)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-07T07:29:11.718Z"},{"error":"McpToolCallError: ### Error\nError: browserBackend.callTool: Target page, context or browser has been closed\n at Ov9 (/$bunfs/root/src/entrypoints/cli.js:1566:63)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-07T07:29:40.530Z"},{"error":"McpToolCallError: ### Error\nError: browserBackend.callTool: Target page, context or browser has been closed\n at Ov9 (/$bunfs/root/src/entrypoints/cli.js:1566:63)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-07T07:29:45.588Z"},{"error":"AxiosError: Request failed with status code 401\n at hB (/$bunfs/root/src/entrypoints/cli.js:108:1194)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:113:12750)\n at emit (node:events:92:22)\n at endReadableNT (internal:streams/readable:86…

TL;DR

Try restarting the Ultra Plan process and ensure that the necessary files and directories have the correct permissions and are not locked by other processes.

Guidance

• Check the file system permissions for /Users/jdrumgoole/.local/share/claude/versions/2.1.92 to ensure that the Ultra Plan process has the necessary access rights.
• Verify that the file /Users/jdrumgoole/.local/share/claude/versions/2.1.92 is not locked by another process, as indicated by the "Lock acquisition failed" error.
• Review the error messages for any indications of authentication or authorization issues, such as the "Request failed with status code 401" error, and ensure that the necessary credentials are properly configured.
• Consider capturing a new snapshot, as suggested by the "Ref e162 not found in the current page snapshot" error.

Example

No specific code snippet can be provided without more context, but ensuring proper error handling and logging in the Ultra Plan process may help diagnose and resolve the issues.

Notes

The provided error messages suggest a variety of issues, including file system permissions, lock acquisition, and authentication problems. Without more information, it is difficult to provide a more specific solution. Additionally, the truncated content may be hiding important details.

Recommendation

Apply workaround: Restart the Ultra Plan process and verify file system permissions, as this may resolve the lock acquisition and authentication issues. If problems persist, consider seeking additional support or debugging the Ultra Plan process to identify the root cause of the errors.