[TS3] Desktop App can't login

I had an SSD failure, so re-installed TS3 on a new SSD, fresh install of windows. I can log in to the website fine, but cannot log into the desktop client, it says “Login Failed”.

I have tried restarting my PC, resetting my router and changing my password, none of these have worked. I have checked my IP is not on projecthoneypot. What would be stopping me from logging in?