Its repeatedly asking for sign in, which is not getting through.
Hey @Durga Nuvvula
Welcome to the community!
The issue happens if you have an add-on that tampers with Atlassian login.
To identify the add-on, I suggest disabling all add-ons installed in your Web browser and restoring the browser default settings, then try again.
If that works, try enabling your add-ons again one by one to see which add-ons is causing the issue.
I hope this helps.