Warning: Undefined variable $property in /srv/www/htdocs/sdnet180/public/library/core/functions/kontakt/kontaktform.php on line 64

Fatal error: Uncaught TypeError: get_class(): Argument #1 ($object) must be of type object, null given in /srv/www/htdocs/sdnet180/public/library/core/functions/kontakt/kontaktform.php:99
Stack trace:
#0 /srv/www/htdocs/sdnet180/public/library/core/functions/kontakt/kontaktform.php(69): KontaktForm->_extendedFill()
#1 /srv/www/htdocs/sdnet180/public/library/core/functions/kontakt/kontakt.php(70): KontaktForm->__construct()
#2 /srv/www/htdocs/sdnet180/public/library/core/functions/base/rmodel.php(394): KontaktModel->__construct()
#3 /srv/www/htdocs/sdnet180/public/includes/application.php(860): RModel::getRimModel('KontaktModel', NULL)
#4 /srv/www/htdocs/sdnet180/public/includes/application.php(564): Application->_getRimModel('Kontakt', NULL)
#5 /srv/www/htdocs/sdnet180/public/includes/application.php(165): Application->_runFrontend()
#6 /srv/www/htdocs/sdnet180/public/index.php(26): Application->run()
#7 {main}
  thrown in /srv/www/htdocs/sdnet180/public/library/core/functions/kontakt/kontaktform.php on line 99