Correct url generation for mail

app/views/registration_mailer/ticket.html.erb

@@ -50,7 +50,7 @@
   <p>If you have any problems, you can contact us via mail: <%= mail_to @registration.event.contact_email, @registration.event.contact_email %></p>
 
   <% if @event.unsubscribe_option %>
-    <p>If you cannot come: <%= link_to "uitschrijven", unsubscribe_path(id: @registration.id, barcode: @registration.barcode)  %></p>
+      <p>If you cannot come: <%= link_to "cancel", unsubscribe_event_registration_url(event_id: @registration.event.id, id: @registration.id, barcode: @registration.barcode)  %></p>
   <%end %>
   <p>Kind regards,<br /><%= @registration.event.club.name %></p>