diff --git a/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.kt b/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.kt
index 89e356a42..bdb3edabd 100644
--- a/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.kt
+++ b/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.kt
@@ -58,19 +58,21 @@ object LicenseFragmentHelper {
      */
     private fun getLicenseStylesheet(context: Context): String {
         val isLightTheme = ThemeHelper.isLightThemeSelected(context)
-        return ("body{padding:12px 15px;margin:0;" + "background:#" + getHexRGBColor(
-            context,
-            if (isLightTheme) R.color.light_license_background_color
-            else R.color.dark_license_background_color
-        ) + ";" + "color:#" + getHexRGBColor(
-            context,
-            if (isLightTheme) R.color.light_license_text_color
-            else R.color.dark_license_text_color
-        ) + "}" + "a[href]{color:#" + getHexRGBColor(
-            context,
-            if (isLightTheme) R.color.light_youtube_primary_color
-            else R.color.dark_youtube_primary_color
-        ) + "}" + "pre{white-space:pre-wrap}")
+        return (
+            "body{padding:12px 15px;margin:0;" + "background:#" + getHexRGBColor(
+                context,
+                if (isLightTheme) R.color.light_license_background_color
+                else R.color.dark_license_background_color
+            ) + ";" + "color:#" + getHexRGBColor(
+                context,
+                if (isLightTheme) R.color.light_license_text_color
+                else R.color.dark_license_text_color
+            ) + "}" + "a[href]{color:#" + getHexRGBColor(
+                context,
+                if (isLightTheme) R.color.light_youtube_primary_color
+                else R.color.dark_youtube_primary_color
+            ) + "}" + "pre{white-space:pre-wrap}"
+            )
     }
 
     /**
diff --git a/app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java b/app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java
index 4f4fd5283..df804136a 100644
--- a/app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java
+++ b/app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java
@@ -62,7 +62,8 @@ public final class NavigationHelper {
     public static final String MAIN_FRAGMENT_TAG = "main_fragment_tag";
     public static final String SEARCH_FRAGMENT_TAG = "search_fragment_tag";
 
-    private NavigationHelper() { }
+    private NavigationHelper() {
+    }
 
     /*//////////////////////////////////////////////////////////////////////////
     // Players
@@ -111,18 +112,22 @@ public final class NavigationHelper {
     public static void playOnMainPlayer(final AppCompatActivity activity,
                                         @NonNull final PlayQueue playQueue) {
         final PlayQueueItem item = playQueue.getItem();
-        assert item != null;
-        openVideoDetailFragment(activity, activity.getSupportFragmentManager(),
-                item.getServiceId(), item.getUrl(), item.getTitle(), playQueue, false);
+        if (item != null) {
+            openVideoDetailFragment(activity, activity.getSupportFragmentManager(),
+                    item.getServiceId(), item.getUrl(), item.getTitle(), playQueue,
+                    false);
+        }
     }
 
     public static void playOnMainPlayer(final Context context,
                                         @NonNull final PlayQueue playQueue,
                                         final boolean switchingPlayers) {
         final PlayQueueItem item = playQueue.getItem();
-        assert item != null;
-        openVideoDetail(context,
-                item.getServiceId(), item.getUrl(), item.getTitle(), playQueue, switchingPlayers);
+        if (item != null) {
+            openVideoDetail(context,
+                    item.getServiceId(), item.getUrl(), item.getTitle(), playQueue,
+                    switchingPlayers);
+        }
     }
 
     public static void playOnPopupPlayer(final Context context,