Can't open any reports.

I've got you back, @lindak1119. I'd be glad to help with opening your reports.

The Community has seen a few users referencing being unable to open reports in QuickBooks Online this week. It seems that browser troubleshooting has gotten them past this and able to view reports. 

Browsers store cache and temporary internet files in order to better optimize loading times, however, too much can accumulate and cause unexpected behavior. The following article contains further insight into this process and includes the necessary steps: How Do I Clear My Browser Cache and Temporary Internet Files?.

Should you continue to experience an issue with loading reports after clearing your cache, I recommend trying an alternative browser. This can help to further isolate the cause of this unexpected behavior.

I believe that this information will help you with running reports.

Please feel free to let me know how it goes by leaving a comment below as I want to ensure this is resolved for you. Have a lovely day.