This means the biblio package is not installed for some reason. 

John

-----------------------------------
Professor John Kitchin 
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803


On Mon, Jul 20, 2020 at 9:10 AM Johannes Brauer <brauer@nordakademie.de> wrote:
Hi!
After having upgraded my packages I can activate org-ref anymore.
(require 'org-ref) results in the error message:
File error: Cannot open load file, No such file or directory, biblio

Any hints what is going wrong?

I am using
org-ref-20200710.1516
Aquamacs 3.5  GNU Emacs 25.3.50.1 (x86_64-apple-darwin16.7.0
macOs 10.15.6

Johannes