I've been getting this today, yesterday it was all fine.
Tried rebooting, validating the files, reinstalled EAC from the game but i still get the same issue.
It seems that my anti virus dosen't allow EAC, WHY?
Easy Anti-Cheat requires a lot of privileges in order to function so it often gets false detected as malicious by different anti-virus software. Add it to exception list and see if that fixes it or not, and if not you probably have to turn it off to play the game.
You should contact your anti-virus support to report the false detection.
And honestly, just turn your anti-virus off. Windows Defender is perfectly fine for the majority of cases. Then just give your PC a scan with Malware Bytes every so often.