Please always check the JavaScript files exist under the directory "%Program Files%Common FilesMicrosoft SharedWeb Server Extensionswpresources"

Normally, installation of QuickApps should take care of deploying these JavaScript files to the server, but sometimes this part of the installation didn't work as expected due to issues with the environment. A re-installation of QuickApps should help in resolving the issue as the installation will put back the files needed.

NOTE: You can backup a copy of the files from another server that is not having this issue and copy them to the above directory on the affected server.