itch.io

Yeah, unfortunately this can happen because the game doesn't contain paid certificate for AV clients. All you can do is make sure that the suspicious file is sent to your AV provider for proper analysis so they can unflag it. Or restore quarantined file if you don't want to wait and trust me (I don't say that you should, it's up to you).

If you want more detailed answer, here's article from game engine developer: https://help.yoyogames.com/hc/en-us/articles/360031016592-What-to-do-if-your-gam...