Hi,

welcome on osm.
The borders of a multipolygon should have the role outer, not inner, see https://wiki.openstreetmap.org/wiki/Relation:multipolygon

And an area with the tag amenity=school includes all parts of the areas (it is the land of the school which includes buildings, parking, sports areas...) : no need to remove these areas inside this land (in another way of speaking, no need of  inner areas).

I fixed your Emmaus college.

Best regards