Hi @Raja simha goli

Normally all you need is to navigate the webterminal link and provide a username and password (tech/demo) and it should work.

Try to reset the Lab and try again.

Please review the below link for more details:
https://learning.intersystems.com/course/view.php?name=UsingInterSystems...

If you are still facing the issue then please share the error details.

Thanks
Regards
Waseem