Manager 21.3.75 won't start in Ubuntu 20.04

Just downloaded latest version 21.3.75 - desktop edition.
However, found it won’t start, comes up with error message. - see screenshot.
Could it be that it is due to requirement of WebView which doesn’t exist in Firefox on Ubuntu ?
Or is there a different broswer in Ubuntu which offers such support?

I need to check but assumption is that is included in base Ubuntu 20.04 install so this file is not included in our AppImage.

I think you should be able to install it by running these commands

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

thanks for the fast reply.
I did do some further testing and tried some add ons for Firefox - no success.
However, using package manager found libwebkit2gtk-4.0-37 missing. → So I’ve installed it and Manger is now working.

…yes, not running Ubuntu (original) but KUbuntu. (It’s more of a Windows7 look alike)