Unable to save Biblio Entry

[pulsating-brain]

I'm getting 2 errors when trying to save my first bibliographic entry - a book. This is a newly installed Biblio instance so I was trying to add my first 2 contributors at this step as well. I'm using Biblio 7.x-3.x with Drupal 7.38 and Entity 1.6.

I've done some googling and nothing showing up anywhere about others having this problem. I wonder if it is related to #158. I know everyone is time-poor so if you point me in the right direction to investigate further I will.