web: fix organizer filtering

web/src/components/events/EventContainer.tsx

@@ -79,7 +79,7 @@ export const EventContainer = ({
       .flat()
       .filter((x) => x.__typename === "EventOrganizer")
       .map((x) => x.slug)
-      .filter((x) => typeof x === "string")
+      .filter((x) => typeof x === "string" && x !== "")
   );
   const filterableOrganizers = uniqueOrganizers
     .map((slug) => eventOrganizers.find((haystack) => haystack.slug === slug))