Zotfile: unable to extract annotations anymore

Hi all, I am using Zotero version: on Mac OS X 10.11.4 and Zotfile 4.2.5
I used to be able to click an item and extract annotations but now this fails silently and no longer create a note containing the extracted annotations.

This happens on my iMac at school and my Macbook at home.

Anyone can help troubleshoot the problem?
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