i had this issue before and what i did was unsubscribe to all my gmod addons and then i went to taskmanager then found steam.exe then i clicked "end proccess" then i loaded back up and it worked.

i had this issue before and what i did was unsubscribe to all my gmod addons and then i went to taskmanager then found steam.exe then i clicked "end proccess" then i loaded back up and it worked.