Composite model and publish to web

My scenario is that I have dataset A and dataset B in a workspace. Those datasets includes reports which are published to web. This is already done so I know that it works.

Then I have dataset C (and couple of report elements included in file same way than we do with A and B), which uses A and B as a data source. There are no other data sources in C, just A and B datasets. I have published C to same workspace where A and B already be, and tried to publish the report to web but it does not work. When clicked the publish to web it just does not do the link. It does something some time but link does not appear and it goes back to default state. 

Because we can create the publish to web links, it can't be related to tenant settings and because the publish to web works with other reports, I assume that the problem is related to my dataset. And because my dataset is composite from two other datasets I just thinking that it might be the reason. 

So, if there should not be any techinical reasons that prevents this publis to web happens, what I should do next? What prevents me to get the publish to web link in this case even it works in every other cases?