student() takes no arguments error. I tried to check everything can anyone please help me in solving it

class Student:
  def __init__(self,name,age,grade):
    self.name = name
    self.age = age
    self.grade = grade # 0 - 100

  def get_grade(self):
    return self.grade
class Course:
  def __init__(self,name,max_students):
    self.name = name
    self.max_students = max_students
    self.students = []

  def add_student(self,student):
    if len(self.students)<self.max_students:
      self.students.append(student)
      return True
    return False

  def get_average_grade(self):
    pass

I am getting error as follows, I have added two underscore also don’t knwo where I am getting this wrong