Hi Jaskirat singh.Jaskirat singh,
We appreciate your engagement with us on the Microsoft Q&A forum.
We apologize for any inconvenience you experienced in verifying your account after activation of sandbox using Activate sandbox button.
To address this issue, please follow the troubleshooting steps outlined below:
1.Sign out from all tabs in your current browser and clear the cache files. Then, attempt to log in again using your Learn ID credentials.
2.Sign out of your current browser session and try logging in using an incognito window or private browsing mode.
3.Switch to an alternative browser and attempt to log in again.
4.Refresh the page to resolve any temporary glitches and reactivate the sandbox.
5.Attempt to log in with a new personal Microsoft email account on the learn path using a completely different browser. If you do not have one, kindly create a new free Microsoft account. Please note that a Microsoft account, such as Office 365 or Outlook.com, is required for sandbox access.
If you continue to experience issues, please inform us in the comments. We are here to assist you.
If you find this information helpful, please show your appreciation by clicking the "Upvote" and "Accept Answer" buttons on the post.
Thank you.