When i try to add user i get error "There was an issue with your invitation. Try sending it again."

I'm here to provide some insights when adding a user to your account, @mail31.

As per checking, I've found an ongoing investigation (INV-99861) regarding customers receiving an unexpected error, "There was an issue with your invitation. Try sending it again." when trying to add users in QBO.

Please know that our engineers are working to fix the issue as soon as possible. With this, I recommend contacting our support team so you'll be added to the list of affected users and receive email updates.

Here's how:

1. On your QuickBooks Online, click on Help (?).
2. Click either tab to get started: Assistant or Talk to Human.
3. Search Contact Us,  then Start a chat with a support expert.

I've added this article to help you manage user profiles: Add, manage, or delete users in QuickBooks Online.

You can check out this article if you need to change the main user on the account: Change the primary admin user in QuickBooks Online.

If you have more concerns related to adding users to QuickBooks Online-International, don't hesitate to come back to this post by leaving a reply. We're always here to help. Stay safe.