Well for clues
it always help if you provide logs. Anyway I did a quick check and I get this error
File "/home/osmc/.kodi/addons/script.module.requests/lib/requests/models.py", line 390, in prepare_url raise InvalidURL("Invalid URL %r: No host supplied" % url) InvalidURL: Invalid URL u'http://': No host supplied
Which actually is the same error that has been reported here
But as @darwindesign wrote best to go on to the actuall Kodi Addon forum to look for help.
And as you can read there issue was reported and already fixed in the Alpha version
https://forum.kodi.tv/showthread.php?tid=356934&page=37