wrap isLoading into mounted and setState

lib/presentation/widgets/player_selection.dart

@@ -78,9 +78,13 @@ class _PlayerSelectionState extends State<PlayerSelection> {
           suggestedPlayers = [...loadedPlayers];
         }
       });
+      if (mounted) {
+        setState(() {
           isLoading = false;
         });
       }
+    });
+  }
 
   @override
   Widget build(BuildContext context) {