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     150104   1. {main}() /var/www/chemiewerkt/index.php:0
    0.5041    5829596   2. SJB_Request->execute() /var/www/chemiewerkt/index.php:81
    0.5041    5830044   3. SJB_System::getPage() /var/www/chemiewerkt/system/core/Request.php:212
    0.5044    5843124   4. SJB_PageConstructor::getPage() /var/www/chemiewerkt/system/core/System.php:331
    0.5139    6186720   5. SJB_System::executeFunction() /var/www/chemiewerkt/system/core/PageConstructor.php:43
    0.5139    6186744   6. SJB_ModuleManager->executeFunction() /var/www/chemiewerkt/system/core/System.php:189
    0.5171    6250840   7. SJB_Classifieds_SearchForm->execute() /var/www/chemiewerkt/system/core/ModuleManager.php:141
    0.6634    7909668   8. SJB_Form->SJB_Form() /var/www/chemiewerkt/system/user-scripts/classifieds/search_form.php:63
    0.6635    7914764   9. SJB_ObjectProperty->getType() /var/www/chemiewerkt/system/lib/forms/Form.php:36