Apps & Features not working for some computers...

So, I did some testing. I uninstalled the BeyondTrust Remote Support client from my test computer and deleted the program folder. Using the error message for a reference, I searched the Registry for MyServer.MyDomain.net-####### (in your case "bomgar.ncrb.org-5C812483"), noted the install location, and deleted the whole "BeyondTrust Remote Support Jump Client" key. If the install location folder still existed, I deleted it.  I did that for every MyServer.MyDomain.net-#######  listed in the error message.

After doing the Registry clean-up and NOT re-installing the Remote Support Jump Client, I was able to successfully use the Windows Admin Center Apps & Features extension.

But, I haven't been able to find a fix or work-around for the extension not working with the Remote Support Jump Client installed. Hopefully MS will come up with something.

One more observation, the Installed Apps extension works for the Windows Servers.  Go figure.

One more one more observation: If they are using the PowerShell Get-Child or Get-ChildItem cmdlets, then the '[' in the variable will cause an error.  You have to do some jumping around the threads, but I started here https://github.com/PowerShell/PowerShell/issues/12168