GameRhinoUK

First of all, thanks for replying. So i deleted arma3.exe, verified the game cache, re-downloaded the arma3.exe and it still does shows this error. It only, however, does it when i launch through steam. I can launch Arma fine with arma3.exe in the game folder, however this means i can't play workshop mods. It also does it when i launch with the arma3launcher.exe in the games folder.

When i launch Arma 3 it says this (Picture attached). I bought the game three days ago and haven't got to play it yet. I have re-installed 3 times and spent hours searching online. https://gyazo.com/864dd19decc097275bce564b7ee9b83a