After selecting Click here to update to update your Roon Server build, the Remote device may lose connection with the Server and remain stuck on the Waiting for Roon Server screen.
If you get stuck in the Waiting for Roon Server screen:
First, check and confirm that your Roon Server is running in the taskbar.
If it is, press Select a different Roon Server button and re-connect to your server. This should solve things for you.