When I try to add an organization, I type the organization name, then press the "add" button. But I get the error:
> We're having trouble. Check your connection and try again.
Is this an expected error? Am I doing something wrong?

I see a few others with this problem, but no solutions yet:
Cannot add organization (atlassian.com)
It looks like I should either restart by browser (didn't work), or I should check with other admins to see if they are having the problem -- I'll do that. Since I see this is quite common, I think I will close this issue for now and open a support case if I still can't figure it out.