Fatal error: Uncaught Error: Interface "Symfony\Component\Routing\RouteCompilerInterface" not found in C:\xampp\htdocs\adminlte3\vendor\symfony\routing\RouteCompiler 2.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\adminlte3\vendor\symfony\routing\RouteCompiler 2.php on line 20