Auth Component issue on RHEL 7.3

Hello friends, I am working with cakephp 2.6 on Red Hat 7.3. Every time when I try to login, Auth Component is returning invalid username or password. The credentials being given by me are correct. Please guide me whether Auth Component has issues with RHEL 7.3. If not ,then what can be the reason of the not logging in with correct credentials.

Using CakePHP 2.8 on RHEL 7 and Auth Component without issue.