Fatal error: Uncaught TypeError: Argument 1 passed to BuyCoursesPlugin::getSaleListByUserId() must be of the type int, null given, called in /home1/solucier/udepec.com/prueba/plugin/buycourses/src/course_panel.php on line 23 and defined in /home1/solucier/udepec.com/prueba/plugin/buycourses/src/buy_course_plugin.class.php:2404 Stack trace: #0 /home1/solucier/udepec.com/prueba/plugin/buycourses/src/course_panel.php(23): BuyCoursesPlugin->getSaleListByUserId(NULL) #1 {main} thrown in /home1/solucier/udepec.com/prueba/plugin/buycourses/src/buy_course_plugin.class.php on line 2404