Changing game mode, characters are frozen in place

I own a gmod server, not dedicated, hired off a company. When I change game mode and map through the ULX menu, the map and game mode changes but the characters are frozen in place and can’t move.

For example if I change map and game mode to dog fight arcade, all the planes are frozen in place and can’t move. The same things happens if I change to Cube2 game mode and map.

Any ideas?

Errors?

None that I can see.

In dogfight arcade, everyone is able to shoot but the camera and the plane is fixed.