Having trouble in Learn Bash Scripting By Building 5 programs

Tell us what’s happening:
I have been working the course and everything is quite smooth
But until the task “bad_command; echo $?” in the terminal and press enter
I have tried so many times with the exact wordings and even read the Hints
I dont know what is going on with my task.
But I did finish those similar tasks such as [[ 10 -ne 5 ]]; echo $? … etc etc

Your code so far

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Challenge: Build Five Programs

Link to the challenge:

I restart the VM and tried one more time
It works now
it seems the check point cannot detect my code
Thank you for your time to read the problem

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