Hi SrHemus,
Sorry that you are running into this issue!
Are you running the game with the OpenGL renderer or the Software renderer? It may help to switch renderers. If the white screen persists, please try alt-tabbing out of the game and then back into the game to see if that fixes the issue.
If you could find and attach your "maiden.log" file here, it would help us in tracking down and fixing this bug for you.
On Windows, you can find the "maiden.log" file under %APPDATA%\Ion Maiden Preview Campaign (If it's not there, in some cases it can be found instead in the game's install directory). You can quickly get to this directory by pressing simultaneously the Windows-R keys on your keyboard, and then in the Run window, copy and paste the above path & press ok.
Thanks for your report!
Alex