Course 5 week 3 assignment 2

hello i not abler to open my assignment and i have a problem with cell 16 not run about insert audio clip unit test

This assignment was just updated today.
You can get your previous notebook by opening the file with the date code from the “File → Open” menu.

  • Learner Error: Grader timed out

Please try optimizing the efficiency of your solution and submit again. You can also visit the discussion forum to see if your peers have experienced and found resolutions for similar errors, or if course staff have provided prior guidance for these errors… If the error isn’t resolved in 24 hours, please reach out to Coursera through our Help Center.

i received this message while all code run normaly still im facing an technical issue in grade

Sometimes this error means your code has an infinite loop that is triggered by the data set the grader uses.