After Logging in to WordPress, website redirecting to home page.

i am facing issue login redirection issue, on my site when ever i tried to login through wp-admin or wp-login.php with admin details. website redirects me to the home page it should be on wordpress dashboard.

i don’t know what happened with him because it was working fine few days before.

Also after logging in again from home to wp-login page. website say ” you are not allowed to access this page”

Please help.