Hi nikki59
Sorry to hear that you have had that experience with contacting our phone-based team, but a warm welcome to the Community Forum.
I'd be happy to look into the error you have when trying to invite users. To do this could you please confirm the following over Private Message:
- Serial number (or client ID)
- Account name and primary contact name
- Email address you were using when you attempted to invite them
- Email addresses of the affected users
If my response has answered your enquiry please click "Accept as Solution" to assist other users find this information.