Thanks for getting back to us with the additional details of the problem, @lmort,

Allow me to share additional insights to finally get rid of this alert. First, make sure Internet Explorer is set as the default browser for QuickBooks and your computer meets the system requirement for the version you're using.

Make sure you check this first, so we can verify if the error isn't a compatibility issue. These are the system requirements for each supported version:

• System requirements for QuickBooks Desktop 2018
• System requirements for QuickBooks Desktop 2019
• System requirements for QuickBooks Desktop 2020
• System requirements for QuickBooks Desktop 2021

If you already did all the troubleshooting steps and recommendation from this thread, but still getting the same problem, contact our Technical Team.

Please note that we have made some changes to our Support options for QuickBooks Desktop. Our representatives are available through chat or messaging to accommodate all our customers concern effectively. Enable pop-up windows on your browser settings to launch the chat box and connect with our live agents.

To get our Support, follow the steps below:

1. Open QuickBooks and click the Help menu.
2. Select QuickBooks Desktop Help.
3. On the pop-up screen select Contact us.
   
4. Click the Search for Something else button then type your concern in the Ask us anything box.
5. Hit Search then scroll down to get your contact options.

Let me know how it goes in the comment, I want to make sure this is resolved for you. I'm also here to provide further assistance whenever you need it.