Serialization Error: Action needed

I’ve owned this games during the beta times. I am now trying to play the game again now that it has been fully released but I am unable to. The moment I click to join on any server, (with/without battleye, solo/co-op, with/without dlc.) when i get to the loading screen for the server I get a;

Serialization Error: Action Needed
Corrupt data found, please verify your install

I have uninstalled and reinstalled and I have verified the integrity of the game several times.

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