All AI Nodes gone

Dear KNIME-users,

I just opened a workflow after not having it used for around a week and discovered that all nodes relating to the AI extension were gone. Not just uninstalled, but completely gone. I cannot find them in the node explorer either. The only thing that I have changed is that I have tried K-AI.

Here is what I tried:

1. Uninstalled the AI Extension

2. Uninstalled and reinstalled KNIME

3. Checked that I could also see the nodes in the interface

It would be great if someone has found a solution to this problem.

Thank you

Konstantin