Hi Rae S,
Thanks for reaching out to us on the Microsoft Q&A forum. Your patience is greatly appreciated.
We have received confirmation from the back-end team that the issue has been resolved.
Before activating the sandbox, please follow these common troubleshooting steps and then try again:
Sign out from all active sessions in your current browser, clear the cache, and log in again with your Learn ID credentials.
If the issue persists, sign out and try logging in through an incognito or private browsing window.
Alternatively, switch to a different browser and attempt to log in again.
Please try to activate the sandbox now.
We have verified that it is functioning correctly on our end, and for your reference, we’ve attached a screenshot:
If you are still running into issues, kindly attach the screenshots of the error you are getting. We will be glad to assist you.
If the information is helpful, please Accept Answer & Upvote so that it would be helpful to other community members.