After switching to Steam Beta 1728.2 for some time game worked normally, but after some time (few days, few game sessions) it stopped working, I can't load any scenario anymore, lots of errors related to database happen. I tried to verify file integrity, even reinstall;ed the whole game - nothng seemed to help. Sometimes beta wouldn't start at all, but if it starts - I got errors trying to load most every scenario.
I switched back to Steam stable release, used it for few days without any issues, then again switched to steam beta - it worked again. Yesterday I played few scenarios from Workshop, few my own test scenarios (still on beta) - scenarios loaded without problems. Everything worked. Today I started the game and again can't load any scenario - either from Worhshop, or even Standalone Scenario from core game (for example the attached screenshot shows errors when I try to load "Sultans Revenge").
What else could I try or check ? Is it game error or is it my system's fault ? It doesn't happen with stable release.

If I switch to Stable Release, everyting would work, switching again to Beta - won't load (tested that already last time I fought with this issue).
P.S. And also this error (Screenshot_2), didn't notice it at first, it's window was covered by all other windows.

