I'm here to help you with resolving the issue you're having when logging in as the admin, @Brown20221.

First, update QuickBooks Desktop to the latest release to have the latest features and fixes. Try to open your QuickBooks once done. 

If the error persists, run the Quick Fix my Program from the QuickBooks Tool Hub to close all the background processes QuickBooks uses and then run a quick repair on your program.

Here's how to download and install the QuickBooks Tool Hub:

1. Close your QuickBooks application
2. Download the QuickBooks Tool Hub and then open the file you've downloaded (QuickBooksToolHub.exe).
3. Follow the on-screen steps to install and agree to the terms and conditions.
4. Click to open the tool hub and then select Program Problems.
5. Select Quick Fix my Program.
6. Start QuickBooks Desktop and open your data file.

For more troubleshooting steps that can help you resolve the issues you're having when opening your QuickBooks Desktop, check out this article: Fix issues when QuickBooks has stopped working.

Check out this guide on how you can do a clean install of QuickBooks Desktop if you're still having problems: Clean install QuickBooks Desktop. 

Let me know in the Reply section below if you need more help with your company file. I'm always here to help. Have a great rest of the day!