We have not changed anything. It was working but for some reason we deactivated the plugin, then reactivated it, and since we get this error.
I just tried to create a new search, it works sometimes and display some posts, but often I get the same error.
Sometimes I get 2 supplementary errors in the console:
Uncaught ReferenceError: aspjQuery is not defined
at chosen.jquery.min.js?ver=JRMNgs:11
Uncaught ReferenceError: aspjQuery is not defined
at jquery.lazy.min.js?ver=JRMNgs:14
But it can work or not without to display these errors.