C4W2 Assignment - SyntaxError: unexpected EOF while parsing

Hello everyone, I’m trying to solve C4W2 Assignment but got a “SyntaxError: unexpected EOF while parsing”. Does anyone know what happened? My notebook ran just fine from start to finish. Maybe a problem with the grader?

Thank you in advance

Cell #UNQ_C1. Can't compile the student's code. Error: SyntaxError('unexpected EOF while parsing', ('<string>', 1, 6, '_args('))
 Traceback (most recent call last):
  File "/home/www/app/grading/exceptions.py", line 112, in handle_solution_errors
    yield {}
  File "/home/www/app/grading/abstract.py", line 410, in _grade
  File "/home/www/app/grading/graders.py", line 365, in __call__
    variable_value, is_passed = self._validate(context)
  File "/home/www/app/grading/graders.py", line 348, in _validate
    variable_value = self.value_getter(variable)
  File "/home/www/app/courses/tf2_c4/ex2/graders/graders.py", line 181, in getter_cell_UNQ_C1_q0
  File "/home/www/app/courses/tf2_c4/ex2/graders/graders.py", line 25, in FunctionGeneralArgumentChecker
    nargs, kwargs = eval(f'_args{args[1]}', globals(), local)
  File "<string>", line 1
SyntaxError: unexpected EOF while parsing

It seems you are missing a: “(”, “)” or a string is open → "string