C3M5 Analyzing Chlorophyll levels in Australian Coral Reefs : Exercise 1

Hello

i receive error after submit assignment for the 5th or 6th round after fixing some errors . the message as illustrated in the attached image refers to unexpected error in exercise although it works fine in the previous trials and the actual results are matched with the expected results . So please advise
after reboot the server, i get the error refer to ‘SAMPLE_DAY’ without any details as illustrated in the below image

S please advise …
Sherif Salah Ibrahim

Restart Kernel, and re-run the cells again from top to bottom in sequence [1], [2], [3], [4], etc..

Hit Save and try to resubmit again.

I had to remove your screenshot due to the solution you included in the submission criteria on the forum. You can repost the screenshot after cropping on the grading output.