Fatal error: Uncaught TypeError: Absence::getAbsencesByTeacher(): Argument #1 ($teacherId) must be of type int, null given, called in /home/proyectosevg/public_html/01/guardias/app/controllers/TeacherController.php on line 31 and defined in /home/proyectosevg/public_html/01/guardias/app/models/Absence.php:130 Stack trace: #0 /home/proyectosevg/public_html/01/guardias/app/controllers/TeacherController.php(31): Absence->getAbsencesByTeacher(NULL) #1 /home/proyectosevg/public_html/01/guardias/public/index.php(52): TeacherController->absences() #2 {main} thrown in /home/proyectosevg/public_html/01/guardias/app/models/Absence.php on line 130