Hi Adam,
Please make sure you are using the Copy button in the upper right corner of each code block on left, next right-click Paste into the Cloud Shell window on right, then press enter to execute command.
Please test again and let me know if it works okay for you.
NOTE: You need to complete this exercise as well as the later Unit 9 Configure network access exercise within the 1 hour time limit of the sandbox. If for some reason the sandbox expires before you complete them both, please go back to Unit 3 exercise, activate sandbox, complete steps again, then jump back to Unit 9 exercise and complete it.
In other words, Unit 9 exercise depends on you having completed Unit 3 exercise beforehand, within same sandbox.
Please click Accept Answer and upvote if the above was helpful. If something is unclear add a comment below and I will assist.
Thanks.
-TP