Update issues_show_hook_listener.rb

lib/issues_show_hook_listener.rb

@@ -88,7 +88,7 @@ class IssuesShowHookListener < Redmine::Hook::ViewListener
     </div>    "
   end
   
-  def view_issues_sidebar_issues_bottom
+  def view_issues_sidebar_issues_bottom (context={})
     issue = context[:issue]
     return "#{button_to "Bill Time", "#{Redmine::Utils::relative_url_root}/qbo/bill/#{issue.id}", method: :get}"
   end