Fatal error: Uncaught ErrorException: JoliCode\Slack\ClientFactory::create(): Implicitly marking parameter $httpClient as nullable is deprecated, the explicit nullable type must be used instead in /home/www/apache24/_torextonery.cz/www/storage/vendor/jolicode/slack-php-api/src/ClientFactory.php:27 Stack trace: #0 /home/www/apache24/_torextonery.cz/www/storage/vendor/composer/ClassLoader.php(444): {closure:/home/www/apache24/_torextonery.cz/www/index.php:12}(8192, 'JoliCode\\Slack\\...', '/home/www/apach...', 27) #1 /home/www/apache24/_torextonery.cz/www/storage/vendor/composer/ClassLoader.php(444): include() #2 /home/www/apache24/_torextonery.cz/www/storage/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile('/home/www/apach...') #3 /home/www/apache24/_torextonery.cz/www/index.php(60): Composer\Autoload\ClassLoader->loadClass('JoliCode\\Slack\\...') #4 {main} thrown in /home/www/apache24/_torextonery.cz/www/storage/vendor/jolicode/slack-php-api/src/ClientFactory.php on line 27