How to fix "Remote Desktop Services is not configured correctly" on Windows Server 2016 Essentials

Question

I have been running a Windows Server 2016 Essentials server in my home for several years with no issues. About two years ago, I decided to set up remote access so I could access server files while I was away from home. I went through the process of setting up Anywhere Access on the server, setting up the domain name and router manually and uploading an SSL certificate created by Certify The Web. Things have been working fine ever since.However, a few months ago I started noticing a critical error on my dashboard that reads "Remote Desktop Services is not configured correctly". I tried using the Anywhere Access troubleshooting wizard to fix it, but it tells me that I have an issue that it cannot identify. Since the remote access works fine, I could continue ignoring the message, but I would much rather clear the right way if possible.

Any ideas on what to do to clear this message would be appreciated. Thanks!