Thank you for reaching out to us on the Microsoft Q&A forum.
We sincerely apologize for any inconvenience you may have experienced.
In reference to the error message provided, it appears that you have successfully activated a sandbox and created a VM as part of the Unit 3: Exercise - Create an Azure Virtual Machine.
Please note that Unit 3: Exercise - Create an Azure Virtual Machine and Unit 9: Exercise - Configure Network Access are interlinked. It is crucial to complete the Unit 3 exercise first, and subsequently, within the same sandbox activation timeframe, proceed to Unit 9 to complete the exercise. In the event of a sandbox timeout during the lesson, all progress up to that point will be lost. Reactivation of the sandbox environment will be necessary, and the previous exercise (Unit 3: Exercise - Create an Azure Virtual Machine) must be redone. Microsoft Learn exercises are designed to be finished in a single session.
Attached is a screenshot of an important note from Unit 9 for your reference.
To address the reported issue, kindly follow the troubleshooting steps outlined below:
Step 1: Sign out from the current browser login and attempt to log in again using an incognito window or in-private window with your credentials.
Step 2: Log in with a new personal email account into the learning path using a completely new browser and verify.
Step 3: If attempting to create a resource in a subscription lacking necessary permissions, we recommend signing up for an Azure free account through the provided link https://azure.microsoft.com/en-us/free and creating a sandbox environment.
Refer to this link for guidance on running Microsoft Learn training exercises in your own subscription.
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If challenges persist, please attach relevant screenshots for further assistance, ensuring all privacy details are concealed before posting.
Thank you.