I appreciate you for sharing your concern about making an Inuit account, MountainDew.
Base on the details that you provide, including the screenshot, I can see that this is a browser issue. Since you're done with the basic troubleshooting as you mentioned, I suggest contacting our QuickBooks Care Team. I understand that you've already called us about this issue but it would be best to have this error checked in a secure environment and conduct a deeper investigation.
Here's how:
- Go to the Help menu at the upper right.
- Select Contact Us.
- Enter your concern.
- Click Let’s talk.
- Choose Get a callback.
- Type in your contact info.
- Select Confirm my call.

You can check out this article for our most updated contact information: Support hours and types.
Also, let me share these easy-to-access articles, webinars, and video tutorials that will help you in familiarizing the different tasks, features, and functions of QBO. Below are the following:
Looking forward to hearing this issue as resolved. Get back to me if you have other questions and I'm always here to assist.