a strange behavior while syncing … and then syncing partially

Hi Katie,
Zotpress was installed and worked perfectly well (i had only a list formating issue you helped me to solved).

And suddenly, it’s no more able to syncronize. In fact, I tried to uninstall and reinstall, and it seems to accept the zotero account but when trying to import, it says “Sorry, but there was a problem syncing items:”, and yes, nothing after the “:” just nothing.

Sometimes it imports some of the references but it remains on loading 1 to 50, I have to reload the page. When trying to Selectively import, it does load the collection, and when trying to import one, again the same symptoms.

I tryed zotpress on other site on the same server without any problems, so the problem is not the server but the site.

Have you any idea ?
Many thanks

https://wordpress.org/plugins/zotpress/