[Bug] White screen / "Application error" - crypto.randomUUID is not a function

[botdaimyonpf-ux]

Environment

• Self-hosted via Docker (docker-compose.prod.yml)
• simstudio image: ghcr.io/simstudioai/simstudio:latest
• Next.js 16.1.6
• Access: http://192.168.1.52:3000 (local network)

Symptom

After logging in, the screen goes white and displays:

"Application error: a client-side exception has occurred (see the browser console for more information)"

Console Error (root cause)

TypeError: crypto.randomUUID is not a function
    at eR (http://192.168.1.52:3000/_next/static/chunks/86cfdb2b28a0ba33.js:1:41123)

Additional Console Messages

• Cross-Origin-Opener-Policy header ignored (HTTP / non-HTTPS origin)
• 404 on some resources
• 401 Unauthorized on some API calls after login

Reproducibility

Reproduced with Playwright (Chromium) automation. Also occurs in Safari and Chrome when accessing manually.

Related

• Similar to [BUG] Seeing a blank page for local development #1726 (blank page)
• crypto.randomUUID is a known Next.js Client Component issue when used during SSR (see Next.js docs)

Workaround Tried

• Cleared browser cookies: no effect
• OLLAMA_URL disabled: reduced logs but white screen persists

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