Hi, @Diptesh Kumar ,
Please have a check on the IIS. Make sure the corresponding IIS site is running and try to recycle the application pool holding the web application. And would you like to provide more information about your environment?
- Does this issue occur on other web application?
- Have you test the site with other machine and browser?
- Is the sample site alias pointing to the right IP address?
- Check the ULS log for any error message when accessing the site. A simple tutorial blog here.
Feel free to reply with any new findings and update.
If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.