Welcome to the QuickBooks Community, jaron1. I'll be sharing details about the error message you received and troubleshooting steps to ensure you can access the Transaction tab from time to time.
The issue about getting an error message “Unexpected Error QueryProcessingError: null” has been recently tagged as an ongoing issue. Our product engineers are now working to fix this as soon as possible.
I suggest contacting our QuickBooks Support Team, so they can add you to our notification list. This will help our engineers determine the number of affected users. You'll also receive an update through email once this has been resolved.
Then, I also recommend logging in to your QuickBooks account using a private browser. Then, access your Transaction tab from there. This is to rule out the possibility of a webpage issue, and private browsing doesn't store local files or cache.
Use these keyboard shortcuts based on the browser you're using:
- For Firefox or Microsoft Edge, press Ctrl + Shift + P.
- For Chrome, press Ctrl + Shift + N.
- For Safari, hold down Command + Shift + N.
If it works in incognito, I suggest clearing the cache of your regular browser. This removes the history or log of sites so you can start with a clean slate. You can check this article to see the steps: Clear cache and cookies to fix issues when using QuickBooks Online.
If the steps above didn't work, use another supported browser as alternatives.
You may refer to this article to view various banking errors and how to fix them: What to do if you get a bank error or can't download transactions in QuickBooks Online.
Please feel free to reach back out if you have further questions about the error message you've encountered in QuickBooks Online, I’d be happy to answer it for you. I also updated the details mentioned above to ensure that I provided the correct information. Have a great day!
