report builder model creation (Windchill 11)

Please can you change the browser language to English, because it is impossible for you not to have the last modification date since it is a STANDARD attribute of Windchill.

Then, having done that, verify that the table you put in the report is the correct one.

In my case it has this internal name wt.lifecycle.ObjectHistory

Having done that I wouldn't know what else to suggest.