Maybe the above is the issue?
- update the xppen driver to its latest version if not done yet
- set Krita AND! xppen driver to use wintab | or | set Krita AND! xppen driver to use Windows Ink
- restart your system after each change
If that does not help:
- reset Krita to its default state (mixing versions of Krita especially nightly ones with released ones can break your configuration)
- How to reset Krita to its default state
If that does not help:
- post again (maybe with a hint which operating system you are using)