Fixed: Task with removed movie causing error

(cherry picked from commit fc6494c569324c839debdb1d08dde23b8f1b8d76)

Closes #9866

frontend/src/Store/Selectors/createMultiMoviesSelector.ts

@@ -1,12 +1,21 @@
 import { createSelector } from 'reselect';
 import AppState from 'App/State/AppState';
+import Movie from 'Movie/Movie';
 
 function createMultiMoviesSelector(movieIds: number[]) {
   return createSelector(
     (state: AppState) => state.movies.itemMap,
     (state: AppState) => state.movies.items,
     (itemMap, allMovies) => {
-      return movieIds.map((movieId) => allMovies[itemMap[movieId]]);
+      return movieIds.reduce((acc: Movie[], movieId) => {
+        const movie = allMovies[itemMap[movieId]];
+
+        if (movie) {
+          acc.push(movie);
+        }
+
+        return acc;
+      }, []);
     }
   );
 }