Unable to use Q chat CLI

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue
- [x] I have run `q doctor` in the affected terminal session
- [x] I have run `q restart` and replicated the issue again

### Operating system

macOS 15.6.1 (24G90)

### Expected behaviour

Q should respond properly, reply to messages.

### Actual behaviour

throws below error for any chat message.

Amazon Q is having trouble responding right now:
0: No such file or directory (os error 2)
1: No such file or directory (os error 2)

Location:
crates/chat-cli/src/cli/chat/mod.rs:1087

Backtrace omitted. Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.

-- MCP also not loading properly

✗ builder-mcp has failed to load after 0.19 s
- Mcp error: -32002: connection closed: initialize response
- run with Q_LOG_LEVEL=trace and see $TMPDIR/qlog/qchat.log for detail
✗ lab-collab-mcp has failed to load after 0.41 s
- Mcp error: -32002: connection closed: initialize response
- run with Q_LOG_LEVEL=trace and see $TMPDIR/qlog/qchat.log for detail

### Steps to reproduce

_No response_

### Environment

```yaml

[q-details]
version = "1.17.0"
hash = "77840d6959fe04ab7e2b0595d8d7afc7a32ee6b2"
date = "2025-09-29T20:21:39.498906Z (22h ago)"
variant = "full"

[system-info]
os = "macOS 15.6.1 (24G90)"
chip = "Apple M3 Pro"
total-cores = 12
memory = "36.00 GB"

[environment]
os = "Mac"
shell-path = "/Users/USER/.toolbox/tools/toolbox/1.1.2210.0/toolbox-exec"
shell-version = "5.9"
terminal = "iTerm 2"
install-method = "toolbox"

[env-vars]
PATH = "/Users/USER/.nvm/versions/node/v24.7.0/bin:/Users/USER/Library/Android/sdk/emulator:/Users/USER/.toolbox/bin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/opt/homebrew/bin:/Applications/iTerm.app/Contents/Resources/utilities"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.googlecode.iterm2"
```