Wolle

Hi oliwor, thank you for your comment. I read it yesterday morning and hoped that the upgrade would solve the issue. Meanwhile I installed Linux MX 19 that also is based on Debian 10 but quite a bit more recent than LMDE and there it workes. So now I'm going to upgrade LMDE. 

Hello Pratyush, sorry for my late reply. I worked a lot because of the current situation with the virus.

Thank you for working on the problem and let me know if you need more information. As an individual "workaround", I use the old Enpass Beta 6 available in the apt-sources.

Enpass6 crashes since I did the last update with synaptic on March 5th. It was the update from enpass 6.3.3.601 to 6.4.0.631. 

The output in the terminal is:
QQmlComponent: Created graphical object was not placed in the graphics scene (very many times)
QFile::remove: Empty or null file name
Case insensitive sorting unsupported in the posix collation implementation
Numeric mode unsupported in the posix collation implementation
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
Speicherzugriffsfehler (this means in english: segmentation fault)

The system is LMDE 3 Cindy x86_64 which is based on Debian 9.3
Kernel: Linux version 4.9.0-12-amd64 (debian-kernel@lists.debian.org) (gcc version 6.3.0 20170516 (Debian 6.3.0-18+deb9u1) ) #1 SMP Debian 4.9.210-1 (2020-01-20)

Desktop Envirenment XFCE
Window Manager Xfwm4
CPU: Intel i7 920 (8) @ 2.6GHz 
GPU: NVIDIA GeForce GTX 960
RAM: 8 GB

I would be happy if I could get some help in that.

Thanks, Wolle