Thank you for reaching out to the Community, @jonathan78.
This error is often caused by browser issues. Try logging out of your account and then logging back in to refresh your session. Also, ensure you're using a supported and up-to-date browser for best performance and security with QuickBooks Online (QBO).
If the issue persists, consider accessing QBO in incognito mode. You can use these shortcut keys for guidance:
- Google Chrome: Press Ctrl + Shift + N
- Mozilla Firefox: Press Ctrl + Shift + P
- Microsoft Edge: Press Ctrl + Shift + N
- Safari: Press Command + Shift + N
For your future reference on how to categorize online bank transactions in QBO, check out this article: Categorize online bank transactions in QuickBooks Online.
If you have any additional QuickBooks-related concerns, reply to this thread. We’re here to help.