MSTEST tests broken on initialization because "*** Typemock Isolator is currently disabled."

For the last few days my .NET MSTEST tests have been broken on the initialization because of the error below. Another user has reported the same exact thing more than 1 year ago with VS2017 but there still is no resolution.

VS2019 16.8.3 updated today.

YES my license is still good and product still activated in VS.

YES the extension "Integrate with other runners" is still checked.

these have not changed in a month - but the behavior has.

Please HELP ASAP!

*** Typemock Isolator is currently disabled. Enable using the following:

         * Within Visual Studio:

       - Use Typemock Smart Runner  

       - For other runners, Choose Typemock Menu and click "Integrate with Other Runners"

     * To run Typemock Isolator as part of an automated process you can:

        - run tests via TMockRunner.exe command line tool

        - use 'TypeMockStart' tasks for MSBuild or NAnt