[Bug] Ultra Plan execution failures - repeated failures across multiple attempts

Bug Description
three attempts at running Ultra Plan have failed at this point

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.92
• Feedback ID: 471632ea-3e1a-46bd-863f-82e3c8e89836

Errors

[{"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…

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