Something went wrong inside python code

There was an issue where sometimes Python would get the wrong count of layers or masters. I had to circumvent it in the Batch Grader.

I can confirm. Had the same problem.

Same here, “Smooth Node Angle and Proportion” causes

" Something went wrong inside python code
*** -[__NSArray0 objectAtIndex:]: index 0 beyond bounds for empty NSArray"

Opened an issue (with a fair amount of guesswork) here at the plugin repo of “Smooth Node Angle”.
Feel free to chime in there if someone finds a fix and can help.

Georg already opened a Pull Request, as Florian points out. So we need to wait for harbortype to accept it.