The owner of the app, Whitespace, is listed on Google as having their headquarters in St Petersburg. Could it be related to this: https://support.google.com/googleplay/android-developer/answ...? Google has suspended payments to Russia as a consequence of the Russian invasion of Ukraine and the many sanctions results from that (like kicking many Russian banks from the international payment system).
Whitescape also lists a location in Estonia, which obviously isn't a problem, but if Google doesn't know about that (or thinks you're misleading them) then you might still be screwed.
Whitescape also lists a location in Estonia, which obviously isn't a problem, but if Google doesn't know about that (or thinks you're misleading them) then you might still be screwed.