Zotero 7.0
I have Zotero 7.0 which (unfortunately is the only version available to me through my organization). I had to change my password and no I can no longer sync. I have tried multiple passwords and attempts and I am at a loss for what to try next.
Upgrade Storage
Note that you just posted from a second account. Make sure you're trying with the correct account.
But the proper fix is to upgrade to the current version of Zotero. You should speak to your IT department. Zotero 7 is no longer supported.