HTTPoition error

httpotion_error

20:11:48.357 [error] Error in process <0.642.0> with exit value: {badarg,[{erlang,hd,[[]],[]},{'Elixir.RssParser',find_value,2,[{file,"lib/rss_parser.ex"},{line,37}]},{'Elixir.RssParser',convert_rss,1,[{file,"lib/rss_parser.ex"},{line,18}]},{'Elixir.Enum','-map/2-lc$^0/1-0-',2,[{file,"lib/enum.ex"},{...



20:11:48.358 [error] Ranch listener FeederWeb.Router.HTTP had connection process started with :cowboy_protocol:start_link/4 at #PID<0.633.0> exit with reason: {:badarg, [{:erlang, :hd, [[]], []}, {RssParser, :find_value, 2, [file: 'lib/rss_parser.ex', line: 37]}, {RssParser, :convert_rss, 1, [file: 'lib/rss_parser.ex', line: 18]}, {Enum, :"-map/2-lc$^0/1-0-", 2, [file: 'lib/enum.ex', line: 977]}, {Enum, :"-map/2-lc$^0/1-0-", 2, [file: 'lib/enum.ex', line: 977]}, {FeedRetriever, :retrieve_content, 1, [file: 'lib/FeedRetriever.ex', line: 18]}, {FeedRetriever, :"-pmap/2-fun-0-", 3, [file: 'lib/FeedRetriever.ex', line: 10]}]}