Let's perform some browser troubleshooting steps to isolate the issue. To start, let's run your QBO account in private mode. The following are the shortcut keys you can use:
Google Chrome: press Ctrl + Shift + N
Mozilla Firefox and Microsoft Edge: press Ctrl + Shift + P
I also encourage you to visit our QBO Help page. From there, you can browse articles or get some ideas from other QuickBooks users and experts. This way, you'll get more insights that can help you with your accounting tasks.
Let me know how this goes and post a response below if you need further assistance in accessing your QuickBooks account. I'm always around to help you. Have a good one.