for some reason my messenger (freichat pm) in CF is not loading anymore.

The developer console throws out the following errors:

freichat-mobile.bundle.css:1 Failed to load resource: the server responded with a status of 502 () freichat-mobile.bundle.css:1
Uncaught (in promise) TypeError: Failed to fetch dynamically imported module:
Failed to load resource: net::ERR_FAILED nodelb.freichat.com/api/v1/freichat-mobile.js?pubKey=FREE_KEY_1561297509IVbnR&userId=1&displayName=TGl6IGRlIFdpbnRlcg==&displayImage=aHR0cDovL2N1dGUtYnV0LWV2aWwuZGUvYm9hcmQvc2l0ZXMvZGVmYXVsdC9hc3NldHMvaW1nL3Byb2ZpbGVzLzVkMjliYzEzMDUwZDIuanBn&change=20190830&completeClient=YES:1
Access to script at 'https://nodelb.freichat.com/api/v1/freichat-mobile.js?pubKey=FREE_KEY_1561297509IVbnR&userId=1&displayName=TGl6IGRlIFdpbnRlcg==&displayImage=aHR0cDovL2N1dGUtYnV0LWV2aWwuZGUvYm9hcmQvc2l0ZXMvZGVmYXVsdC9hc3NldHMvaW1nL3Byb2ZpbGVzLzVkMjliYzEzMDUwZDIuanBn&change=20190830&completeClient=YES' from origin 'http://cute-but-evil.de' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

I hope You can help me please.

Kind regards, Andy