Error 1101
Error 1101 Worker Threw Exception Error
What This Error Means
Error 1101 indicates that a Cloudflare Worker (serverless script) threw a JavaScript exception during runtime. This means the code running on the edge crashed.
Common Causes
- Bug in the Worker script code.
- Unhandled promise rejection.
- Exceeding CPU or memory limits for the Worker.
- API failure called by the Worker.
How to Fix It (For Users)
- 1 Notify the site owner.
- 2 There is no workaround for users.
For Site Owners / Developers
- Check Cloudflare Worker logs for the stack trace.
- Debug your JavaScript code.
- Ensure you are handling exceptions with `try/catch` blocks.
- Check if you are hitting resource limits.
When It Is NOT Your Fault
If the site's custom edge code is buggy.
Check if this outage affects everyone globally
This error often indicates a wider problem. Use our tool to verify if the site is down for everyone.
Check Website Status →Recommended Tool to Prevent This Error
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