Unassigned DOI Number (Issue with Assigning DOI in Publication Section)

I have followed the necessary steps to input the DOI information for my publication, but unfortunately, the SAVE button does not function properly. Despite multiple attempts, the changes I make are not saved, and an error message appears stating that the DOI has not been assigned to the publication.

I would like to request your assistance in resolving this matter.

Can you save other metadata in the Publication, for example the title and abstract?