Let's resolve the error you're having to accept the invitation successfully, @Lnap.
After making sure that your client sent the invitation to the correct email address and they have an active account, you can let them resend the invitation.
You can ask your client to cancel the invitation and then send a new invitation. To delete the invitation and send you a new one, your client may follow the steps outlined in the following article and proceed to Step 3: What to do if you can't accept client invites in QuickBooks Online Accountant.
Check out this article to guide you with updating or editing a client’s info or making them inactive from your account: Manage clients in QuickBooks Online Accountant.
Let me know if you need further help accepting the email invitation by leaving a reply below. Keep safe and have a wonderful day!
