How to trouble shoot if there is no entityset available when creating a tile

For example:

In my case, when I first select F4 value help for “Entity Set”, I can see a series of CDS views listed, which are retrieved by the batch request observed in Chrome development tool.

Since my CDS view “Z_C_PRODUCT” does not appear there, so I type it manually and click search icon. A second batch request is sent:

I can see my typed CDS view name is included as filter operator in this request:

Now I select the value help for OData service. The response for this request contains OData service metadata url.

When you now select value help for the third field “Entity Set”, the metadata of this OData service is requested via the url fetched from the previous request. After a successful metadata request, you should see the entity set. If not, usually there is something wrong in the metadata retrieve. You should see detailed error message in Chrome development tool.