Don't throw error in case there are no extras
Don't throw error in case there are no extras

ckan/ckanext-archiver,DanePubliczneGovPl/ckanext-archiver,DanePubliczneGovPl/ckanext-archiver,DanePubliczneGovPl/ckanext-archiver,ckan/ckanext-archiver,ckan/ckanext-archiver