No steam id

My roommate and I want to play gmod through lan. we have seperate gmod accounts and legitiment copies of gmod. If i host I will get kicked from my server with the msg console kicked: NO STEAM ID or something the lines of that. If he hosts we can play for about a minute and i will gain the same msg… I have looked online but all of the solutions have to do with pirated copies of gmod. If anyone has a solution i will love them long time.

You sure about that

He very well may be telling the truth, I have a similar problem with joining servers - however, the message varies from “NO STEAM ID” to “STEAM VALIDATION REJECTED”. Still clueless though.

If you really do have a legit copy, contact Steam support.

I fixed it, all i had to do was logout of steam and log back in and it fixed it.