Sorry for the late reply!
We had a problem with the Google Scholar (see also Google Scholar Fetch error) fetcher which should be solved in current development builds which are available here: https://builds.jabref.org/master
Sorry for the late reply!
We had a problem with the Google Scholar (see also Google Scholar Fetch error) fetcher which should be solved in current development builds which are available here: https://builds.jabref.org/master