Remember

Should the images have been created differently?

Also, I saved them as icons. Then, there won't be something like in the screenshot when you lower the graphics settings in the game from high to normal and lower. Without dedicated mipmaps highlighted in red.

I noticed that one icon has a white background: Genius64x64 (Texture), and Maragor and MaragorTemni x64 and x128 have frames.

P.S. If you set 4 players, you can't click on the hero's portrait to enter the hero menu from the first to the third player; you can only do it with a hotkey. When the turn comes for the fourth player and onwards, everything works normally.