Invalid private key for encryption app. Please update your private key password in your personal settings to recover access to your encrypted files

Yes, it’s the same here. I have an installation on 13.0.2 without the message and another on 13.0.4 with the message.

I am left with the question, if I backup the 13.0.4 installation and reinstall. Will that solve the problem or do I still have the same situation?

Up until now there has been no encryption used on either installations. So where does this come from?