Fix test failure

Author: Isira-Seneviratne

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeParsingHelper.java

@@ -746,16 +746,15 @@ public static Optional<String> getUrlFromNavigationEndpoint(
                                 }
                             });
                 })
-                .or(() -> {
-                    final var watchEndpoint = navigationEndpoint.getObject("watchEndpoint");
-                    final var videoId = watchEndpoint.getString(VIDEO_ID);
-                    final var playlistId = watchEndpoint.getString("playlistId");
-                    final var startTime = watchEndpoint.getInt("startTimeSeconds", -1);
-                    final String url = "https://www.youtube.com/watch?v=" + videoId
-                            + (playlistId != null ? "&list=" + playlistId : "")
-                            + (startTime != -1 ? "&t=" + startTime : "");
-                    return Optional.of(url);
-                })
+                .or(() -> Optional.ofNullable(navigationEndpoint.getObject("watchEndpoint", null))
+                        .map(watchEndpoint -> {
+                            final var videoId = watchEndpoint.getString(VIDEO_ID);
+                            final var playlistId = watchEndpoint.getString("playlistId");
+                            final var startTime = watchEndpoint.getInt("startTimeSeconds", -1);
+                            return  "https://www.youtube.com/watch?v=" + videoId
+                                    + (playlistId != null ? "&list=" + playlistId : "")
+                                    + (startTime != -1 ? "&t=" + startTime : "");
+                        }))
                 .or(() -> {
                     final var playlistId = navigationEndpoint.getObject("watchPlaylistEndpoint")
                             .getString("playlistId");

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMusicSongOrVideoInfoItemExtractor.java

@@ -88,15 +88,20 @@ public String getUploaderUrl() throws ParsingException {
         if (searchType.equals(MUSIC_VIDEOS)) {
             return getMusicUploaderUrlFromMenu(songOrVideoInfoItem).orElse(null);
         } else {
-            final JsonObject holder = songOrVideoInfoItem.getArray("flexColumns")
+            final var endpoint = songOrVideoInfoItem.getArray("flexColumns")
                     .getObject(1)
                     .getObject("musicResponsiveListItemFlexColumnRenderer")
                     .getObject("text")
                     .getArray("runs")
-                    .getObject(0);
-
-            return getUrlFromNavigationEndpoint(holder.getObject("navigationEndpoint"))
-                    .orElseThrow(() -> new ParsingException("Could not get uploader URL"));
+                    .getObject(0)
+                    .getObject("navigationEndpoint");
+
+            if (!endpoint.isEmpty()) {
+                return getUrlFromNavigationEndpoint(endpoint)
+                        .orElseThrow(() -> new ParsingException("Could not get uploader URL"));
+            } else {
+                return null;
+            }
         }
     }