fix handling of missing collections in API 
fix handling of missing collections in API 
alephdata/aleph,OpenGazettes/aleph,gazeti/aleph,smmbllsm/aleph,alephdata/aleph,smmbllsm/aleph,gazeti/aleph,alephdata/aleph,alephdata/aleph,smmbllsm/aleph,pudo/aleph,gazeti/aleph,OpenGazettes/aleph,alephdata/aleph,OpenGazettes/aleph,gazeti/aleph,OpenGazettes/aleph,pudo/aleph,pudo/aleph