Can't compile the student's code

I tested and passed all tests in Notebook, but got 0/100 with the following error. Any advice?
Cell #UNQ_C3. Can’t compile the student’s code. Error: SyntaxError(‘invalid character in identifier’, (’/tmp/student_solution_cells/’, 44, 20, ‘metrics= [“accuracy”]\n’))

Which week?
Which assignment?

It was my Course 4, week 2 assessment 2. I resubmitted 10 mins later and passed.