Apertif Collections “Imaging” or “Timedomain” query fails

If I go to https://sdc-dev.astron.nl/esap-gui/archives/apertif/query and set “Apertif Collections” equal to “Imaging” before hitting submit, I get the message:

138, ["Error: ''collection''. Could not translate key: 'collection' for value: 'imaging'. Available translation parameters: {'target': 'target__icontains', 'title': 'target__icontains', 'ra': 'view_ra', 'dec': 'view_dec', 'fov': 'view_fov', 'dataproduct_level': 'calibrationLevel', 'dataproduct_type': 'dataProductType', 'dataproduct_subtype': 'dataProductSubT_and_dataProductSubType__in=uncalibratedVisibility_and_page_size=50"]

(and similarly for collection “Timedomain”).

If I set collections to “All” the query works as expected.