Prepomax does not load .frd file, bad fonts in GUI

Hello,
I installed Prepomax through bottles on Ubuntu 24.04
The launcher does work except for certain fonts missing and boxes in data fields.(I would be glad if someone knows how to fix them since I downloaded all fonts dependencies in bottles but still does not work.)
The problem is also with loading .frd file. Whenever I try to load file I get this message:

Please help.
Regards
vishwas

This is not really a PrePoMax bug since it is conneted to Linux. Moving post to General Questions.