Claude code getting API error 401 authentication error...

Bug Description
Claude code getting API error 401 authentication error invalid OAuth token But this doesn't make any sense since I have logged in and out successfully and uninstalled and reinstalled Claude code, and still nothing is working. And I'm on the max subscription plan.

Environment Info

• Platform: darwin
• Terminal: cursor
• Version: 1.0.45
• Feedback ID: 5414a5f0-d500-4f9d-b565-749154d3a03d

Errors

[{"error":"Error: Command failed: security find-generic-password -a $USER -w -s \"Claude Code\"\nsecurity: SecKeychainSearchCopyNext: The specified item could not be found in the keychain.\n\n    at genericNodeError (node:internal/errors:983:15)\n    at wrappedFn (node:internal/errors:537:14)\n    at checkExecSyncError (node:child_process:882:11)\n    at execSync (node:child_process:954:15)\n    at qD (file:///Users/kmaurinjones/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:702:3921)\n    at file:///Users/kmaurinjones/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:623:9350\n    at Q (file:///Users/kmaurinjones/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:526:14406)\n    at mC (file:///Users/kmaurinjones/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:623:8496)\n    at uC (file:///Users/kmaurinjones/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:623:7361)\n    at zB (file:///Users/kmaurinjones/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:623:11970)","timestamp":"2025-07-10T01:12:19.876Z"},{"error":"RangeError [ERR_CHILD_PROCESS_STDIO_MAXBUFFER]: stdout maxBuffer length exceeded\n    at Socket.onChildStdout (node:child_process:481:14)\n    at Socket.emit (node:events:507:28)\n    at Socket.emit (node:domain:489:12)\n    at addChunk (node:internal/streams/readable:559:12)\n    at readableAddChunkPushByteMode (node:internal/streams/readable:510:3)\n    at Readable.push (node:internal/streams/readable:390:5)\n    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)","timestamp":"2025-07-10T01:12:20.402Z"},{"error":"Error: 401 {\"type\":\"error\",\"error\":{\"type\":\"authentication_error\",\"message\":\"Invalid OAuth token. The provided token was not found or is malformed.\"}}\n    at D6.generate (file:///Users/kmaurinjones/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1305:12612)\n    at pq.makeStatusError (file:///Users/kmaurinjones/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1322:2100)\n    at pq.makeRequest (file:///Users/kmaurinjones/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1322:5311)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-07-10T01:13:08.079Z"}]