I had a problem after the last Updates of the modules.
rm -Rf /var/www/html/admin/modules/extensionroutes/
cleared up the problem.
When I first got back in to the GUI after the above command, I had a welcome screen I hadn’t seen before (or at least that I have ever remembered). I stepped through it which included reactivating the server.
Now, I am unlicensed for EndPoint Manager. How can I fix this?