Fixed: Series Network filter breaking if network was not available

frontend/src/Store/Actions/seriesIndexActions.js

@@ -298,12 +298,16 @@ export const defaultState = {
       label: 'Network',
       type: filterBuilderTypes.STRING,
       optionsSelector: function(items) {
-        const tagList = items.map((series) => {
-          return {
+        const tagList = items.reduce((acc, series) => {
+          if (series.network) {
+            acc.push({
               id: series.network,
               name: series.network
-          };
             });
+          }
+
+          return acc;
+        }, []);
 
         return tagList.sort(sortByName);
       }