fix tickets bug with no description

app/helpers/conference_helper.rb

@@ -21,4 +21,9 @@ module ConferenceHelper
       '%20Sponsorship'
     ].join
   end
+
+  def short_ticket_description(ticket)
+    return unless ticket.description
+    markdown(ticket.description&.split("\n").first&.strip)
+  end
 end

app/views/conferences/_tickets.haml

@@ -20,7 +20,7 @@
                 %h3.text-center.word_break
                   = ticket.title
                 .word_break
-                  = markdown(ticket.description.split("\n")&.first.strip)
+                  = short_ticket_description(ticket)
                 %button.btn-block.btn.btn-lg.btn-success
                   %i.fa.fa-ticket.fa-fw{"aria-hidden": true}
                   = humanized_money_with_symbol(ticket.price)