Zotero connector not not saving references (Pubmed/Sciencedirect)

For about two weeks now, each time that I click on my zotero connector icon, nothing happens.
Beforehand I would have a little pop-up telling me exactly what was being saved and where from, now nothing is displayed. When i then access my zotero library to double check, i can confirm that nothing new has been saved.

I've tried to save references for multiple different articles from Pubmed and Sciencedirect, nothing seems to work.

I've generated a Debug ID if that can help : D781665629.

I also went through the trouble shooting page and checked that everything was compatible/up to date, all seems fine. Before I only used Zotero online, I didn't have the desktop application. Since the problems started, I have downloaded the desktop application but this did not sync with my online library - an issue apart, but in any case, this did not solve the problem of saving references.

I do wonder is it's not a anti-virus/firewall issue but my colleagues do not seem to have this problem.

Can anybody offer a solution?
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