We have validated the process of installation, uninstallation and again installation of the module in a 7.11 environment, and it works correctly. Can you report your version of Suitecrm to perform a test with your version?
It is very important to perform Quick Repair and Rebuild after module installation,
and then correctly set the equivalences within Admin/Gantt Project Settings
The app needs to connect to a web service that has to be visible (public), you can open a port to your local server from your intranet to the outside through firewall policies of the router (if you have the knowledge to do it)