Hi Patrick Mulvany,
Thanks for posting your question in the Microsoft Q&A forum.
The issue might be a temporary problem. We’ve completed our part of the task, so you can try again now. If your sandbox was closed or ended unexpectedly, please wait for the previous session to finish and follow the terminal commands shown in the screenshot to create the resources before moving on to the next steps.
For your information, kindly refer to the screenshot below.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.