Lab is not opening

when I click on launch app it does not open the lab but carry me to the community. kindly guide me how to open the lab?

What app are you referring to?

Hello Maazullah,

That Launch app page will take you to the community as mentioned

This course uses a third-party app, [IMPORTANT] Have questions, issues or ideas? Join our Community!, to enhance your learning experience. The app will reference basic information like your name, email, and Coursera ID.

to open lab you need to refer to either the ungraded lab page or assignment page.