Can't search nzbgeek.info newznab service

[rootflags]

INFO 2015-04-15 10:13:36.003097
Init search of Book(de.lad1337.books)[12] Neal Stephenson Cryptonomicon on Newznab (Default)
DEBUG 2015-04-15 10:13:36.021932
Final search term set for Book(de.lad1337.books)[12] Neal Stephenson Cryptonomicon is: [u'Neal Stephenson Cryptonomicon']
DEBUG 2015-04-15 10:13:37.531575
Newsnab final search for term Neal Stephenson Cryptonomicon url https://api.nzbgeek.info/api?apikey=##apikey##&maxage=2000&o=json&cat=&q=Neal+Stephenson+Cryptonomicon&t=search
ERROR 2015-04-15 10:13:37.533955
Error during downloadWrapperSingle of Newznab (Default)
Error: Expecting value: line 1 column 1 (char 0)

Traceback (most recent call last):
File "/data/opt/XDM/xdm/plugins/meta.py", line 160, in outer
return run(_args, *_kwargs)
File "/data/opt/XDM/xdm/plugins/bases.py", line 538, in downloadWrapperSingle
res = self._searchForElement(_args, *_kwargs)
File "/opt/XDM/plugins/Indexer/Newznab-de_lad1337_newznab-0_7/Newznab.py", line 71, in searchForElement
response = r.json()
File "/usr/lib/python2.7/dist-packages/requests/models.py", line 756, in json
return json.loads(self.content.decode(encoding), **kwargs)
File "/usr/lib/python2.7/dist-packages/simplejson/init.py", line 501, in loads
return _default_decoder.decode(s)
File "/usr/lib/python2.7/dist-packages/simplejson/decoder.py", line 370, in decode
obj, end = self.raw_decode(s)
File "/usr/lib/python2.7/dist-packages/simplejson/decoder.py", line 393, in raw_decode
return self.scan_once(s, idx=_w(s, idx).end())
JSONDecodeError: Expecting value: line 1 column 1 (char 0)

New value:[]
Traceback:
Traceback (most recent call last):
File "/data/opt/XDM/xdm/plugins/meta.py", line 160, in outer
return run(_args, *_kwargs)
File "/data/opt/XDM/xdm/plugins/bases.py", line 538, in downloadWrapperSingle
res = self._searchForElement(_args, *_kwargs)
File "/opt/XDM/plugins/Indexer/Newznab-de_lad1337_newznab-0_7/Newznab.py", line 71, in searchForElement
response = r.json()
File "/usr/lib/python2.7/dist-packages/requests/models.py", line 756, in json
return json.loads(self.content.decode(encoding), **kwargs)
File "/usr/lib/python2.7/dist-packages/simplejson/init.py", line 501, in loads
return _default_decoder.decode(s)
File "/usr/lib/python2.7/dist-packages/simplejson/decoder.py", line 370, in decode
obj, end = self.raw_decode(s)
File "/usr/lib/python2.7/dist-packages/simplejson/decoder.py", line 393, in raw_decode
return self.scan_once(s, idx=_w(s, idx).end())
JSONDecodeError: Expecting value: line 1 column 1 (char 0)