Jun 28 2017 04:07 AM
Jun 28 2017 04:23 AM - edited Jun 28 2017 04:24 AM
Does your app appear in the site contents or in the New -> App -> Apps you can add?
Although faded away ( while installing) , you should get something like this:
Jun 28 2017 06:15 AMSolution
If you go to your requested apps list edit the list item and click on the link View App Details and then you can add it by clicking try it or buy it (assuming you have permissions to do so):