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Up to date: Yes
Legit or Pirate copy: Legit
Steam/CD/Social Club: Steam
Windows version: Window 10 update 1703
Did you try to delete caches.xml and try again: Yes
Error screenshot: https://gyazo.com/62ccd7638cccaeeba27ca94c66c5e693
This error is quite common and can be fixed be removing trainerv.asi from your FiveM directory.
Not to worry though, as all you need to do is remove it, then start up your game and join your server. From there, you and put the .asi file back in and restart your game.