After press play button in project, UI element in scene no working

Recently, errors began to appear in the log and after starting the project in unity, the interface buttons are inactive. I use Unity IAP, Unity Ads.
Please tell me, someone came across a similar one? Moreover, the problem is of a floating nature.

 

Some of those errors make me think you're executing Unity code in a constructor, or else in an IAP callback that is not on the main thread. In Unity, 100% of everything you do against the engine API must be done in the main thread.

This means no Unity code can be called in class constructors (static or instance) since those are NOT called from the main thread except for non-Unity classes that you new up yourself.

Look at any one of the thousands of tutorials for doing IAP and follow their patterns.

 

Thanks. The fact is that until ~ October 14, everything worked fine, the project was successfully published in the Google Play Market, but the time has come to release Update and I faced such a problem.

 

I'm sorry, I just didn't know which branch to address this problem to.