Failed to save a note

No idea how this entry can be edited, but let me add additional information this way:
Platform: Windows 11
App version: 5.11.6 (yes, I am using the latest update according to the app)

and YES I have checked the troubleshooting guide (even though this checkbox is unchecked, again no idea how to check it after publishing this issue report)

This bug is preventing ANY work with Inkdrop on my Windows 11, no creating of new entries, no saving of entries, nothing.

It is a significant problem, not a minor nuisance. I look forward to hearing from you.