Updating reference not working


I used to put only the DOI on my reference, close the window, and then press “Find reference updates”. It would then propose me to update all fields found online. 

However, this is not working anymore. I even tried to re-add a previously added article through this method, in order to make sure that it was not a problem with the DOI, but it won’t work.

I tried to reset my preferences as mentionned on another topic, but it didn’t solve the problem. 

MacOS Sierra 10.12.3, EndNote X7 (7.7.1).

Many thanks for helping me out !