Not to sound rude, but try "Search" there are many threads with common problems.
It could be an account, there used to be a 'pointer error' that would last for a bit on certain characters/accounts, was awkward, and unfixable, but I don't think it's what you have wrong.
Anyway, try restarting your pc, deleting your GG folder (So that it redownloads fresh). If it's still not working, try reinstalling as well, although it is said to not work it could help.