Report ActionCable errors to Sentry

app/channels/application_cable/connection.rb

@@ -1,4 +1,10 @@
 module ApplicationCable
   class Connection < ActionCable::Connection::Base
+    rescue_from StandardError, with: :report_error
+
+    private
+      def report_error(e)
+        Sentry.capture_exception(e)
+      end
   end
 end