try to fix fatal on notifications index when a topic is invalid (#1115)
try to fix fatal on notifications index when a topic is invalid (#1115)

* try to fix fatal on notifications index when a topic is invalid

* Update index.html.erb

metamaps/metamaps_gen002,metamaps/metamaps_gen002,metamaps/metamaps,metamaps/metamaps,metamaps/metamaps,metamaps/metamaps_gen002,metamaps/metamaps,metamaps/metamaps_gen002