Medline search not working

I have
JabRef 3.7-dev–snapshot–2016-11-04–master–949ca17
windows 7 6.1 amd64
Java 1.8.0_66.
Is there any reason that medline search is not working? I looked for “fang george brinkmeier” in the medline search. The search window opended but closed after some seconds without any reaction, just closed. The search in pubmed resulted in PMID:27828722 DOI:10.1210/er.2016-1101. Looking with PMID worked in Jabref, too. Do I have to open a bug report or is there already one?

Regard Bernhard

Have a look at Trouble accessing Medline