wp-admin url not working.

Hello,

I am using Smart Magazine theme for my site pakaugiri.com but not able to login recently in the site as the login URL is returning a message stating “oops! the page does not exist.”
Link – https://pakaugiri.com/wp-admin
I have searched for the same in wordpress forums and google and tried everything like increased the memory limit to 256 in wp_config, renaming Plugins Folder, Renaming themes folder, etc. by logging into cpanel. Can anyone suggest what can be done so as to access my site. I did not have this problem until last month and I don’t remember making any changes.

Thanks!!!

The page I need help with: [log in to see the link]