When I am logged in to QuickBooks for more than an hour, I have to close QB and restart due to numerous error messages. This just started 2 weeks ago.

Hello there, ned7.

I can see how important to work with QuickBooks with experiencing errors and other odd behaviors.

We can clear the app data to fix app-related issues. Please check this link for the complete steps: Troubleshooting Quick-Start Guide for the QuickBooks Online app.

If you have tried accessing QBO in a web browser, I'd recommend using an incognito window. This type of window doesn’t store any cache that causes a browser to load slowly or experiencing unusual behavior. Here are the shortcut keys you can use depending on the browser:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + P
• Safari: Command + Shift + N

If your book is working well without error messages, go back to your regular browser and clear its cache to prevent any unexpected behavior. Also, you can use other compatible browsers in QBO. One more thing, I'd like to know the exact error you've seen. This way, we'll be able to figure out and provide you with the right resolution.

You may consider checking these article for additional details about QBO:

• Account management.
• Banking. 

Please stay in touch if you still need help. The Community is always around to assists. Stay safe always.

Hi ned7,

Hope you’re doing great. I wanted to see how everything is going about the error you've received when logging in to your QBO account. Was it resolved? Do you need any additional help or clarification? If you do, just let me know. I’d be happy to help you at anytime.

Looking forward to your reply. Have a pleasant day ahead!