TF2 won't launch

When I launch TF2 I get an ERROR saying:

"Tried to add C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\tf\custom\material as a search path.



This is probably not what you intended.



Check C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\tf\custom\readme.txt for more info"

I validated my steam files too.

PICTURE: