Hi, is it possible to create nested table on apex page using  pageBlockTable or other tags?

I got an erreor: Save error: Object type not accessible. Please check permissions and make sure the object is not in development mode: SOQL statements cannot query aggregate relationships more than 1 level away from the root entity object. RequestAsPDF.page.

Using <apex:column breakbefore> and a controller extention could fill the child table content in a new row.

But is there anything already there to use? Thanks.