Error on getSort in AbstractSearch
CRM_DataprocessorSearch_Form_AbstractSearch::getSort(): Return value must be of type CRM_Utils_Sort, null returned in CRM_DataprocessorSearch_Form_AbstractSearch->getSort()
CRM_DataprocessorSearch_Form_AbstractSearch::getSort(): Return value must be of type CRM_Utils_Sort, null returned in CRM_DataprocessorSearch_Form_AbstractSearch->getSort()