Hi @210573 (Customer)​ ,

I got the same error, tried to restart and create a new cluster but the solution does not work. What I did to fix the issue:

1. Instead of putting in function, break the code out to run line by line. I just want to see where the error happens
2. Then, I figure out the specific line code in between got an error "Internal error. Attach your notebook to a different cluster or restart the current cluster."
3. Check that specific codes and fix errors (for my case is about incorrect schema defined even Databrick does not mention exact error of schema). After the schema is fixed, the error is gone

So I think it is more about the coding errors

All the best