@getgoingneha,
It looks to me that you will need to login at siteurl/wp-admin until this vulnerability is fixed. Hope that helps.
This is the Details (root cause?)
Secret Login Page Location Disclosure on Multisites vulnerability discovered by Naveen Muthusamy (Patchstack Alliance) in WordPress Plugin WPS Hide Login (versions <= 1.9.11)
I hope it is fixed soon! Although it is a Multisite vulnerability the “Bypass Vulnerability” seems to switch it off on single-sites!