I'm here to walk you through converting your file successfully, @SMapes. 

In order to convert your QuickBooks Online file, ensure that QuickBooks Desktop is closed. Internet Explorer's security has to be configured next.

Here's how:

1. Add *.intuit.com to the rusted sites.
2. Within Internet Options, select the Security tab.
3. From the Command Bar, select Tools and choose Internet Options.
4. Open Internet Explorer.
5. • Click Trusted Sites.
   • Within the Trusted sites window, un-check Require server verification ( https: ) for all sites in this zone.
   • In the Add this website to the zone field, type: *.intuit.com. Note: It is recommended that you remove all other websites in reference to intuit.com from the list of websites, as *.intuit.com will cover all Intuit sites.
6. Close the Trusted sites window.
7. Uncheck Enable Protected Mode.
8. Close Internet Explorer.

Once done closing Internet Explorer, we can now proceed with running QuickBooks Desktop and Internet Explorer in Administrator Mode. Before doing so, make sure QuickBooks Desktop is installed on your computer.

Here's how to run as Admin:

1. Locate the program from a desktop shortcut, or through the programs in the Start menu.
2. Right click on the program and select Run as administrator.

If you still encounter the error, you can follow these steps below:

1. Open a Sample company, choose a Services-based sample company.

2. Close the company and go back to the No Company Open screen.

3. Click the menu bar Help --> Activate QuickBooks Desktop.

4. Tp the Activate button

5. Close the "We just need to verify your identity to activate" browser window, return to the No Company Open screen.

6. Start the conversion process again with QBO.

Export your data again to see how it goes. Here's an article for more reference: Visual Guide to Export.

I'll be around if you need a hand on this. Keep me posted if you have any further questions.