This isn't the impression I'd like you to experience, @Stanislav Svyntytskyi.
Rest assured, our engineers are working diligently on getting this resolved. Meanwhile, you'll want to invite your client using a different email address.
Here's a guide for the detailed steps: Add clients to QuickBooks Online Accountant.
Additionally, feel free to browse this link here to view all articles of QBOA. Just choose a topic that fits your concern.
Please know that you're always welcome to reply anytime if you have follow-up questions with account management. I'll be around to help. Take care and have a great day ahead.
