ErrorException: $strictLocaleNegotiation

Hi, I got in trouble with my locally installed Codeigniter project.
I was developing my web site on my local PC, Windows 10 as OS...so I had installed PHP 8.3, Codeigniter using Composer and MySQL
Now I have updated PHP to 8.4.5 version...updated Composer...and when I run the command

Code:

php spark serve

I get he following error

Code:

D:\_GAVS_nuovo_sito\composer-gavs>php spark serve
PHP Fatal error:  Uncaught ErrorException: Undefined property: Config\Feature::$strictLocaleNegotiation in D:\_GAVS_nuovo_sito\composer-gavs\vendor\codeigniter4\framework\system\HTTP\Negotiate.php:131

Any hint to fix the issue? Thanks a lot for any feedback