GMod crashes when changing map/server

When i load up GMod and go into a server everything is fine…But as soon as they put a mapvote or the map randomly changes, It downloads the files (Sometimes none) and then the screen goes black , and a message comes saying “hl2 has encounterd an error…”…And same goes when changing the server , or disconnecting and connecting again.

And i get other random crashes when i’m in-game in a server …When somebody talks on the mic , or something laggy happens…And these are random…But the one that i mentioned up there happens all the time.