Causes

• a Cloudflare Worker throws a runtime JavaScript exception.

Fixes

Step 1: Provide Appropriate Issues Details

Provide appropriate issues details to Cloudflare Support. May refer the link below :

https://support.cloudflare.com/hc/en-us/articles/200172476#h_7b55d494-b84d-439b-8e60-e291a9fd3d16