I'm not actually sure what the problematic character is - it might have been " " or another special character (obviously I'd rather not reveal my password ๐).
I usually use full, grammatically correct sentences for passwords ("passphrases"). It works in desktop, but in Jeroba if your password has that phrase it won't log you in.
Instead, you'll be listed as "Anonymous" and you won't be able to take any action other than switch to a different account or sign out. It took me to my home instance, but I couldn't actually do anything.
After changing my password to a more "traditional" one, everything worked fine.