Hi AI X,
We value your understanding and patience with the Microsoft Q&A forum.
I wanted to let you know that everything is working as it should now that the "Sandbox" problem has been fixed and restored. You can proceed to successfully finish the module.
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.