Mathe-Detektivgeschichte mit Sir Louis Hamleys

Error message

• Deprecated function: TYPO3\PharStreamWrapper\Manager::initialize(): Implicitly marking parameter $resolver as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of /mnt/web519/d0/82/51320782/htdocs/drupal/includes/file.phar.inc).
• Deprecated function: TYPO3\PharStreamWrapper\Manager::initialize(): Implicitly marking parameter $collection as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of /mnt/web519/d0/82/51320782/htdocs/drupal/includes/file.phar.inc).
• Deprecated function: TYPO3\PharStreamWrapper\Manager::__construct(): Implicitly marking parameter $resolver as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of /mnt/web519/d0/82/51320782/htdocs/drupal/includes/file.phar.inc).
• Deprecated function: TYPO3\PharStreamWrapper\Manager::__construct(): Implicitly marking parameter $collection as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of /mnt/web519/d0/82/51320782/htdocs/drupal/includes/file.phar.inc).