Unable to preview project

I’m trying to preview my project by clicking preview in new tab, but in new tab it is keep on
loading and showing generating preview from long time, please help me to resolve this issue asap as i need to take exam.
Thank you

@ellursaikiran kindly check if your internet connection is stable. I have taken this to the team and we’ll get back to you shortly.

This project is an evident example of IoT in action. The project deals with the sensing of temperature with the help of LM35.