Thank you for dropping by again in the Community space, Thomas.
I understand how runtime issues can affect your business activities with QuickBooks. I also appreciate your troubleshooting efforts to fix this issue. Please know that this isn't what we want you to experience.
I recommend reaching out to our Support Team to investigate this matter. They have the necessary tools to review your account and provide the appropriate action to rectify this problem. You can click this link to contact support: https://quickbooks.intuit.com/uk/contact/.
Moreover, feel free to refer to this article if you want to update your credentials in your QuickBooks account: Change your email, user ID, or password for QuickBooks Online, QuickBooks Online Accountant, and Qui....
I'm also looking forward to assisting you in the future if you have other QuickBooks-related concerns. We're available 24/7. Keep safe!