which version of Qlik Sense are you using? Metadata cannot be read before June 2018 version Have you done any configuration inside the app, once imported? One of the requirements is to define a variable to point to the central node of your infrastructure.
@rzenere_techedge - Our current version is Qlik Nov 2019 version. And yes, the only configuration I changed within the load script is to point it to our central node. So the load script is pulling all the data such as app names, stream names, etc,. but no pulling the table names for apps.
I tried on same version and it's running smoothly.
On the central node virtual proxy, have you set load balancing for all nodes except central node itself? If you try the link used by QS (http(s)://<central node>/api/v1/apps/<app GUID>/data/metadata), what is the result you get?