[2019] Game doesn't recognize my username.

So, to put it simply.
I can log into the website fine, but when I'm actually trying to log into the game, I get an error stating I need to enter a valid login, even though I input the email I JUST registered with.

Screenshots:
https://imgur.com/a/OVMR4BV

I thought it mightǘe been an issue with the fact Iḿ trying to run the game on Linux, but attempting to log in using my phone yields the exact same result.

Should I try to create another account and hope for the best or is there a fix for this?