Fatal error: Declaration of Grav\Plugin\FlexTheater\ProgrammationsObject::getFormValue(string $name, $default = null, string $separator = '.') must be compatible with Grav\Common\Flex\FlexObject::getFormValue(string $name, $default = null, ?string $separator = null) in /var/www/html/user/plugins/flex-theater/classes/ProgrammationsObject.php on line 98