Fatal error: Uncaught Error: Class "ilBaseMailRfc822AddressParser" not found in /var/www/html/ilias/components/ILIAS/Mail/classes/Address/Parser/class.ilMailPearRfc822WrapperAddressParser.php:25 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Mail/classes/Address/Parser/class.ilMailPearRfc822WrapperAddressParser.php on line 25