1. Open your Steam Library
2. Right Click on Robocraft or whatever game your want to verify the game files of
3. Select Properties
4. Select Local Files tab
5. Select Verify Integrity of Game Cache...
6. Wait for it to complete and then click OK
7. Congratulations, you have verified the game! Now go test the game out to see if that fixed your problem.

Contact NGnius

Email: ngniusness@gmail.com
Discord: NGnius#0864
Steam: NGnius(ness)