Pundit policy errors on creating new remixes

[raincrash]

When creating the first remix for a Hub, an unable to find policy of nil error occurs. This happens when authorize @republished_feed is called (Pundit::NotDefinedError in RepublishedFeedsController#create). Weirdly, this happens with "republished_feed"=>{"hub_id"=>"1", "title"=>"MainRemix", "url_key"=>"mainRemix", "description"=>"", "limit"=>"50"}, "commit"=>"Create new remix feed", "hub_id"=>"mainhub"}. The remix is created successfully when the title and url_key are test and test. I coun't trace why this is happening.

Also, when "Create a new Remix record" is clicked from an items list, a Couldn't find RepublishedFeed with 'id'=0 error is triggered. The sent parameters are {"hub_id"=>"mainhub", "id"=>"0"}.