Implicitly marking parameter $request as nullable is deprecated in PHP 8.4

Problem/Motivation

Deprecated: Drupal\language_access\Plugin\LanguageNegotiation\LanguageAccessNegotiationBrowser::getLangcode(): Implicitly marking parameter $request as nullable is deprecated, the explicit nullable type must be used instead in /var/www/html/web/modules/contrib/language_access/src/Plugin/LanguageNegotiation/LanguageAccessNegotiationBrowser.php on line 19
PHP Deprecated: Drupal\pathauto\AliasStorageHelper::__construct(): Implicitly marking parameter $entity_type_manager as nullable is deprecated, the explicit nullable type must be used instead in /var/www/html/web/modules/contrib/pathauto/src/AliasStorageHelper.php on line 79