External App gets Error Message

[Ariella Noth]

I had an external app, that up until yesterday was working fine. Now I get the following error message: 

Any ideas???

[#2]

I have seen another thread reporting the same problem. I recommend you to open a support ticket...it seems something has changed in the backend that is causing Client WebParts to fail when loading in a modern page

[#3]

Here's a thread which referenced same problem

https://techcommunity.microsoft.com/t5/SharePoint-Developer/Something-went-wrong-error-SPFX-React-Sc...