Error on Linux Debian(bullseye)

After a clean install of Debian 11 (Bullseye), I get this error message when executing the app-image file.

image

I installed Debian with the KDE Plasma desktop only.

Before I was using Manager on Bullseye, but it was upgraded from Buster. It had Gnome and KDE desktop.

What do I need to do? where do I start?

As per error message, you need to make sure libwebkit2gtk-4.0.so.37 is installed on your system.

Try:

sudo apt-get update
sudo apt-get install libwebkit2gtk-4.0-37

problem fixed!