error "The configuration information for the game is invalid or missing"

The configuration information for the game you’re trying to edit is invalid or missing.

I get that error when I try launch Hammer Editor with any game? Help please!

Has the game been run at least once since installation? If not, do so.

Otherwise, run Reset Game Configurations from Source SDK.

It’s because I got new computer parts, almost everything was replaced, so my E drive where Steam is, is now called D drive. Let me try Reset. Be right back

I think I fixed it, I changed the Game location to the right place.