Tools created with xmlhelpy do not register in Kadi4Mat or KadiStudio anymore

Hello,

I have been using custom Python scripts in Kadi4Mat workflows for a while now. I decorated them with xmlhelpy and successfully ran my workflows with it.

But somewhen last month the very same scripts (or more precisely, their XML files from --xmlhelp) stopped registering in my Kadi4Mat instance with experimental_features=True. I deleted and re-uploaded new versions of them, and they didn't show up in the "Select tools" dialog. I re-re-uploaded their old versions, just to be sure the issue is not on my end, and they also didn't register anymore.

I also can't get them (now, the PY files) to register in KadiStudio. As KadiStudio may be more helpful in debugging, I attached a screenshot of how it fails there.

I attached another screenshot of the commands it tries to invoke working.

And I checked that the venv was active when I started kadistudio from command line.