Fatal error: Call to a member function getType() on a non-object in /var/www/chemiewerkt/system/lib/orm/ObjectProperty.php on line 202

Call Stack:
    0.0004     146052   1. {main}() /var/www/chemiewerkt/index.php:0
    0.6672    5813168   2. SJB_Request->execute() /var/www/chemiewerkt/index.php:81
    0.6672    5813616   3. SJB_System::getPage() /var/www/chemiewerkt/system/core/Request.php:212
    0.6674    5826692   4. SJB_PageConstructor::getPage() /var/www/chemiewerkt/system/core/System.php:331
    0.7184    6170216   5. SJB_System::executeFunction() /var/www/chemiewerkt/system/core/PageConstructor.php:43
    0.7184    6170240   6. SJB_ModuleManager->executeFunction() /var/www/chemiewerkt/system/core/System.php:189
    0.7209    6234140   7. SJB_Classifieds_SearchForm->execute() /var/www/chemiewerkt/system/core/ModuleManager.php:141
    0.9045    7820604   8. SJB_Form->SJB_Form() /var/www/chemiewerkt/system/user-scripts/classifieds/search_form.php:63
    0.9050    7839636   9. SJB_ObjectProperty->getType() /var/www/chemiewerkt/system/lib/forms/Form.php:36