My sharing ability has been suspended. I THINK that this was triggered when I accidentally mistyped an email address for sharing a folder. I assume that when the "nondeliverable" message bounced back to Dropbox, the platform decided that "my files might contain phishing content." But now I can't access anything relating to sharing; I can't even see who I have shared with in the past. I'm on a Basic plan, so support assistance is nonexistent. What can I do to resume access to sharing?