[ERROR] Error spawning process: Error: posix_spawnp failed.

[odbol]

Describe the bug
Same as #372, but I'm not allowed to reopen it.

To Reproduce
Steps to reproduce the behavior:

1. npx @siteboon/claude-code-ui
2. Installs version 1.27.1
3. Log in and click Claude Code to authenticate

Expected behavior
Authenticates with CC

Screenshots
If applicable, add screenshots to help explain your problem.

Error message

🐚 Shell client connected
📨 Shell message received: init
[INFO] Starting shell in: /Users/phreakhead/Documents/development
📋 Session info: Plain shell mode
🤖 Provider: plain-shell
⚡ Initial command: claude --dangerously-skip-permissions /login
🔧 Executing shell command: claude --dangerously-skip-permissions /login
📐 Using terminal dimensions: 110 x 31
[ERROR] Error spawning process: Error: posix_spawnp failed.
    at new UnixTerminal (/Users/phreakhead/.npm/_npx/844e9b06ba9fb183/node_modules/node-pty/lib/unixTerminal.js:92:24)
    at Object.spawn (/Users/phreakhead/.npm/_npx/844e9b06ba9fb183/node_modules/node-pty/lib/index.js:30:12)
    at WebSocket.<anonymous> (file:///Users/phreakhead/.npm/_npx/844e9b06ba9fb183/node_modules/@siteboon/claude-code-ui/server/index.js:1816:40)
    at WebSocket.emit (node:events:524:28)
    at Receiver.receiverOnMessage (/Users/phreakhead/.npm/_npx/844e9b06ba9fb183/node_modules/ws/lib/websocket.js:1220:20)
    at Receiver.emit (node:events:524:28)
    at Receiver.dataMessage (/Users/phreakhead/.npm/_npx/844e9b06ba9fb183/node_modules/ws/lib/receiver.js:596:14)
    at Receiver.getData (/Users/phreakhead/.npm/_npx/844e9b06ba9fb183/node_modules/ws/lib/receiver.js:496:10)
    at Receiver.startLoop (/Users/phreakhead/.npm/_npx/844e9b06ba9fb183/node_modules/ws/lib/receiver.js:167:16)
    at Receiver._write (/Users/phreakhead/.npm/_npx/844e9b06ba9fb183/node_modules/ws/lib/receiver.js:94:10)
🔌 Shell client disconnected

Desktop (please complete the following information):

• OS: macOS 15.7.4
• Browser Chrome
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]

Additional context

Running the patch script in #372 (comment) fixes it, but fresh installs still have the issue. Is there a way to fix it for fresh installs?

[coderabbitai]

⚠️ Possible Duplicate Issue(s)

• Failed to log in, can't do anything #372

🔗 Related PRs

#347 - fix(macos): fix node-pty posix_spawnp error with postinstall script [merged]
#375 - fix: claude code login issues [merged]
#424 - fix: add support for Codex in the shell [merged]
#451 - fix(claude): correct project encoded path [merged]

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[dir-808]

Also experiencing this unfortunately

[viper151]

This has now been fixed with version 1.29.5