Thanks for posting here in the Community, @lindak1119.
Allow me to share some details about being unable to generate reports in QuickBooks Online.
Currently, we have an ongoing issue wherein customers were unable to access reports. Our engineers are now diligently working to get this issue resolved in a timely manner.
To get the latest updates about this matter, I'd suggest giving our Customer Care Team a call. They'll be able to add you to the list of the affected users and notified via email about the status of the issue.
I would like to add that I just tried running reports on my own books for last year and can't get any types of reports to run. When clicking on the Reports section in the left-hand pane, nothing happens. Also when accessing any of the reports from the briefcase in the green menu bar at the top, nothing happens either.
It seems like going into a clients QBO file and then back to your own QBOA file then the reports become accessible. I'm not sure if this is a bug but that's how I was able to get it to work for me.
Let’s resolve the error that you’ve encountered when running reports, @josie8.
It's possible that piled-up cache in your regular browser caused this unusual behavior. You can clear your current browser’s cache to resolve this.
Go to your account by using a private browser or an incognito window. If you can now run the report, clear the cache in the one that you're currently using.
Here’s how to go incognito or use a private browser:
For Chrome, press Ctrl+Shift+N.
For Internet Explorer or Firefox, press Ctrl+Shift+P.