Fatal error: Uncaught TypeError: Sphinx_adapter::set_match(): Argument #1 ($field) must be of type string, array given, called in /var/www/acadam/application/helpers/search_helper.php on line 704 and defined in /var/www/acadam/application/libraries/Sphinx_adapter.php:74 Stack trace: #0 /var/www/acadam/application/helpers/search_helper.php(704): Sphinx_adapter->set_match() #1 /var/www/acadam/application/helpers/search_helper.php(369): Sphinx_source_model->set_subject() #2 /var/www/acadam/application/models/data_sources/my_community_tutors_data_source.php(45): Sphinx_source_model->apply_criteria() #3 /var/www/acadam/application/models/data_sources/my_community_tutors_data_source.php(80): My_community_tutors_data_source->get_listing() #4 /var/www/acadam/application/helpers/search_helper.php(180): My_community_tutors_data_source->get_count() #5 /var/www/acadam/application/controllers/search.php(50): Paginator->get_page_listing() #6 /var/www/acadam/application/core/MY_Controller.php(451): Search->index() #7 /var/www/acadam/system/core/CodeIgniter.php(305): Acadam_Controller->_remap() #8 /var/www/acadam/public/index.php(228): require_once('...') #9 {main} thrown in /var/www/acadam/application/libraries/Sphinx_adapter.php on line 74