Lo-Fi Games

this is due to Anti Virus software giving a false positive.
you need to allow thru your anti viruses software.
you do not need to delete or uninstall the game
just allow permissions via your anti V Software.

Hi.

this solution works for "Warning Character template missing" too?

i do not know
but i would think you might have a corrupt file.
so best thing to do is search for it, delete it, then re-validate your game cache files on steam.