Lumira Server for HANA Cannot Load data set for Visualization

Hi
I'm new to SAP Lumira and currently working with SAP Lumira server.

I created Analytical view for my schema which automatically loads data set to Lumira server. So, now I have some data sets in Lumira server which I would like to visualize. But it is taking indefinite time to load the data set (in visualize tab) which is blocking my work.

Kindly let me know the root cause for this "indefinite loading" and how I can resolve this issue.

And,

   Are there any RESTful apis inorder to integrate the visualized reports which are Present in Lumira server into the HTML?

Kindly Respond.

Thanks and Regards,

Shashi Kiran