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Can you help Stanislav Hronek ?

Graphic tablet not working

Hello,
I am trying to set up a graphic tablet wacom intuos for the purposes of online teaching maths.

My software is linux mint 20 cinnamon. I plug in the tablet and open up the graphic tablet app in system settings and it recognizes the tablet, pen works fine. Few minutes later I want to change some settings so I open the graphic tablet app in system settings again however nothing happens nothing opens up.

I am new to linux so I have no idea why this is happening, online teaching is starting soon so I would like to have this working.
Thank you for any tips.