Ambari Dashboard is not getting loaded and Sign in Issue

[#1]

I am trying to login to the Ambari console by entering the URL localhost:8080 but the sign in page is not coming and while trying to sign in through the small window(shown in the image) after giving the username and password its getting refreshed every time and again asking for username and password. Please guide me everyone regarding two things

1.how can I get the Ambari sign in page loaded and fixed?

2.Why after giving the username and password it is getting refreshed and not getting signed in?

Please help me. 

[#2]

Hi Navanil, 

Can you please try to check the Ambari server logs and see what error or warn is reported in it. Are you using admin/admin credentials ? If not can you please try that.  Also check the ambari.properties have the right server hostname.