Fatal error: Uncaught Error: Interface 'React\Promise\PromisorInterface' not found in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\vendor\react\promise\src\Deferred.php:5
Stack trace:
#0 {main}
  thrown in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\vendor\react\promise\src\Deferred.php on line 5