Easy Form won't enable after an upgrade

After updating the App the App won't enable and the update button just spins. 

Need to make sure "workbox - host plugin" is working

  1. As an Admin, go to manage Apps & check to see if  "Workbox - host plugin" is enabled. 
    1. If you don't see it then click on "all apps"
    2. scroll down to the bottom of the list & enable the App. 
  2. This app is required for starting "Easy forms"
    1.  "Workbox - Host Plugin" is part of "Confluence Mobile Web Plugin". If you disabled "Confluence Mobile Web Plugin" then "Workbox - Host Plugin" was disabled automatically. If you don’t need the "Confluence Mobile Web Plugin" you can disable this app right after the "Easy forms" starts.