I get back from a work trip with a day to myself and I'm greeted by this lovely message whenever I try to Play the game.

I've found and followed the instructions I found here: https://forum.square-enix.com/ffxiv/threads/480176

Which as a side not, lowering your computers security should never be considered a solution. Either way, same error.

I've removed and reintalled the game. Still not working. Open to ideas.