itch.io

Yeah that's normal. You just have to click on the more info thing, I think, and it should give you the option to run anyways. 

getting a similar bug, when i download on web it straight up doesn't let me download because it says "virus detected" and the download isn't compatible with the itch launcher
I could probably disable a ton of security features and whatnot, but... I don't wanna do all that for a problem that might get fixed soon... so yeah

EDIT: dont know what i did differently but it worked now. i dont think anything updated so.. thats cool,, will update again if anything goes wrong

oh ye, just retried it again and it went through lol, didnt disable anything, all good :3