"Update your GPU driver if possible, if that didnt fix it then your GPU might not support the minimum requirements for Unity engine because your GPU is to old"
Took that from discord´s pinned messages, but it might just be missing files due to anti-virus scanners blocking some files when extracting. Whitelist the folder and location when extracting to that location you want.
The game is safe, its just that virus scanners can have hard times detecting if the content is from a confirmed developer, so they automatic flag it unsafe.