The application environment is not set correctly.

[YogX15]

When I updated composer, suddenly an error like this appeared

Warning: Use of undefined constant ENVIRONMENT - assumed 'ENVIRONMENT' (this wil l throw an Error in a future version of PHP) in C:\laragon\www\ltrtrs\vendor\cod eigniter4\framework\system\CodeIgniter.php on line 583

Warning: Cannot modify header information - headers already sent by (output star ted at C:\laragon\www\ltrtrs\vendor\codeigniter4\framework\system\CodeIgniter.ph p:583) in C:\laragon\www\ltrtrs\vendor\codeigniter4\framework\system\CodeIgniter .php on line 587