We have tried to register the journal for DOI but faced with the following error:
Element ‘{http://www.crossref.org/schema/4.3.6}journal_volume’: This element is not expected. Expected is one of ( {http://www.crossref.org/schema/4.3.6}contributors, {http://www.crossref.org/schema/4.3.6}publication_date ).
Would you please advise what we need to do.
Thank you and best regards,
Ruzbeh