Hello there, QV-Arthington.

Thanks for sharing the steps you've taken so far to try fixing the error.

Every version of QuickBooks has its corresponding system requirements. For QuickBooks Desktop 2020 (latest version), it requires an Internet Explorer 11 as your browser. Since it's an updated software, it should work with an updated browser to be able to run QuickBooks seamlessly.

Feel free to visit this link to upgrade your browser.

Here's an article where you find out more about QuickBooks Desktop 2020 system requirements which includes the supported Operating System, Database Servers, Browser Requirements and more: System requirements for QuickBooks Desktop 2020 and Enterprise Solutions 20.0.

If you've tried the solutions above to no avail, it would be best to reach out to our QuickBooks Care Support. They have the tools to conduct a thorough investigation for a complete resolution.

Here are the steps to contact support:

1. Click Help at the top menu and select QuickBooks Desktop Help.
2. In the Have a Question? window, enter a topic.
3. Click Contact us.
4. Hit the Stat Messaging button.
   

Please take note our operating hours for chat support depends on the version of QuickBooks that you're using. Please see this article for more details: Support hours and types.

Keep me posted for additional questions or other concerns. I'd be more than happy to help. Wishing you the best of luck.