I am sorry to hear this, Julie.
First, have you already contacted our support team? If so, can you share your ticket number with me?
Second, you may want to try this and see if it helps: Hold down the shift key while reloading the page. We've seen errors of some things not loading fully on a page that our team is investigating, and this can sometimes clear that up.
When you say you can't send invitations by email, can you maybe add a little detail? You don't see the option to, a button doesn't work, the email never gets delivered? Something else?
Thanks for that. I'm on a Mac as well, but I haven't been able to reproduce this error. We'll try to get to the bottom of it.
Thank you.. I've tested on two computers this morning... both are acting the same.
Update: I was able to get onto a PC running IE..and everything is working fine there.