Strange error message i cant fix

i will get an error every once in while and garrysmod will crash and i get a message that says steam not worthy of your trust on line and then a bunch of random numbers. now i think i know that its to get rid of pirates. now i have bought the game and you could check if you like. this happens after loading a second map after going to another

Is Steam up to date? What’s the exact message?

your steam profile links to an error
who uses “gmodlover” as a name on steam custom url?

i have this error check my name cuzza376, but it says ive played 30 hours, wich i have in the map construct any others and i get the error