Fatal Error - Number of shared states is different on client and server! Delta: 10

Fatal error in Metadata/Monsters/ChaosGodOwlBoss etc. etc @30 and Fatal Error - Number of shared states is different on client and server! Delta: 10

This crashed my game today during a map when I was completing a remnant with rare unique :(

Cannot log back in as I am still in the instance it seems, games keep crashing, tried verifying game files and reinstalling my graphics driver.