yeah past few month iv dealt with these kind of issues, id say, this could be due to numberous reasons. im not sure why unreal 5.2 would give this error as in what you did, once you install the plugin, you should activate it in unreal and restart, if your build gives this error, it could be due to you having maybe android billing enabled, disable it and use the plugin above which uses billing 7.0, on top of that, it should work, just make sure you didnt edit the engine files, so maybe verify your engine version, comment out the receiver_exported area in game activity, start public for api 34+, then once you made sure android billing is turned off and the new plugin is used it should work.