Enrollment for the ML Engineering for Production Specialization will be closed

Hi,
I have completed all tasks in the Week 1 Assignment with all the correct ouputs. However, when I press Submit Assignment I get the following error:

Bad request: {‘errorCode’: None, ‘message’: ‘Failed to find active course item with atom Vket9RVaEeuRpQ4rKgBMmw for 117557225’, ‘details’: None}

I can find no solution to this problem. Can you help please?

Regards
RB

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