[DanCooper]

IMDB has changed the website, you need the latest build from komplex: Link
PS: IMDB results are now also depended on your media language setting. Plot and plot outline will only be scraped if you've set the movie/tv show to language "en-*".  

 Thanks Dan. Another question. Is it possible to get certifications for specific countries. For instance for Denmark with their rules? I can't get that to work.  

Someone that can answer above regarding certification?
 An extra question. How do I get movies in Sets to appear right in Plex (it works in Kodi) and can you get votes also in Plex from Ember? 

 Set the Certification limit to "Denmark" and enable the option "Use Certification for MPAA".

I think Plex does not support "extended collection information" like Kodi does. So maybe you've to disable that in Embers settings to save the old node style in NFO.
I don't know how Plex imports the rating and votes.