The problem seems to be the following:
--> running the report without filters, the extracted data are complete
--> running the report using the mentioned filters, the extracted data are not complete (i.e. the report does not extract the data related to Item Type "AULA" = Classroom).
Learning Management System (LMS)
CLASSROOM items do not have a required by date
All the AULA trainings are CLASSROOM items and correspond to Scheduled offerings and therefore they have no "required by date".
That is why they show when you run the report without any data filters but not when you apply a date filter for "Required date from" and "Required date to".
User Learning Needs report , KBA , LOD-SF-LMS-REP , Reporting Data , Problem