Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
I've experienced pretty much exactly the same issue. I've tried uninstalling, and reinstalling, twice now, and it still doesn't work.
One potential difference which I'm seeing is when I start up a virtual machine I get this message;
One or more kernal components loaded on your Mac are for another version of Parellels Desktop....
I've logged a ticket (#537939) and would appreciate assistance urgently.
Solution below should be used only in case the version 4 build 3844 is currently installed. Do not use it with any other build of Parallels Desktop.