Hi Darr, Sonya A,
Thank you for contacting us on the Microsoft Q&A forum.
We’ve contacted our internal team about the sandbox issue for this module "Describe the core architectural components of Azure". They’ve confirmed that the sandbox has been restored and is now functioning as expected. You can now continue with your learning goals and complete the module by finishing the sandbox exercises.
If you are still facing any issue, please let us know in the comments and where you are encountering this error along with the screenshot for reference. We are glad to help you.
If the information is helpful, please Accept Answer and Upvote so that it would be helpful to community members.