Fatal error: During inheritance of mysqli: Uncaught ErrorException: Return type of Database::multi_query($resource) should either be compatible with mysqli::multi_query(string $query): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/www/uni1/includes/classes/class.Database.php:255 Stack trace: #0 /home/www/uni1/includes/common.php(34): errorHandler(8192, 'Return type of ...', '/home/www/uni1/...', 255) #1 /home/www/uni1/includes/common.php(34): require() #2 /home/www/uni1/index.php(7): require('/home/www/uni1/...') #3 {main} in /home/www/uni1/includes/classes/class.Database.php on line 0