Thank you for letting us know your experience while opening reports in QuickBooks Online.
I've checked and verified that we have an ongoing issues with other users about this. We've already submitted a ticket and our engineers are all hands on deck working together for an immediate fix to sort everything out.
As of now, I suggest contacting our QuickBooks Online Support Team to add you to the list of affected users and receive an email notification for the latest updates.
For the support's contact information and business hours: