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Why does a Command line from the course instructor give the wrong answer?

From Introduction to Wolfram Language - Manipulate

I copied this line from Exercise 9.4

Manipulate[Graphics[Style[Disk[],Hue[h]]],{h,0,1}]

straight from the course instructor video. Yet, it is graded as incorrect. Can you help me what I am doing wrong ? Thanks in advance
POSTED BY: Roberto Catanuto
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Hi Roberto,

Thank you for pointing out the error, we will be updating the course framework in the next few days. I will post here when the updated exercise has been deployed.

Best Wishes,

Cassidy Hinkle

Wolfram U Team
POSTED BY: Cassidy Hinkle

Hi Roberto,

Sure, you can contact Wolfram U directly on wolfram-u@wolfram.com
POSTED BY: Ahmed Elbanna

Is it possible to contact Wolfram U directly to highlight the issue? I have found another question with a potential wrong feedback. Thank you.
POSTED BY: Roberto Catanuto

I, personally, think you are doing it right. These variations are also graded "incorrect":

Manipulate[Graphics[Style[Disk[],Hue[h]]],{{h,0.},0,1}] (* == expected output *)
Manipulate[Graphics[{Hue[h], Disk[]},{h,0,1}] (* my personal preference *)
Manipulate[Graphics[{Hue[h], Disk[]},{{h,0.},0,1}]

All achieved the stated task in Ex. 9.4, as I understood it.
POSTED BY: Michael Rogers
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