Authentication error help me?

How can i fix it can somebody help me please ?

Need more info, what are you unable to do? What plat form.

It happens to me as well, time to time. Basically, you can’t enter into the game. But it works for me after a few tries. Try restart the game. Or check if Steam wants to update, or even close it and open the game again. If you play on pc.

I piay on Xbox so my answers are general, but it might be time to have your pc serviced.

Who should take its pc to service? Me?

PC’s and laptops need software maintenance about ever 3 years or so. Temporary files and cookies removed, registers reordered, vireos removed, drivers updated, etc. I use a local store that has a tech section. who guarantees fixing problems and won’t charge me if the fix is simple.