CAS Authentication failed!

You were not authenticated.

You may submit your request again by clicking here.

If the problem persists, you may contact the administrator of this site.

phpCAS 1.3.3 using server https://upm-id-portal.upm.edu.my/sso/ (CAS 2.0)

Fatal error: Uncaught exception 'CAS_AuthenticationException' in /var/www/html/perakamwaktu/upmidsso/CAS/Client.php:3205 Stack trace: #0 /var/www/html/perakamwaktu/upmidsso/CAS/Client.php(1409): CAS_Client->validateCAS20('https://upm-id-...', '<cas:serviceRes...', Object(DOMElement)) #1 /var/www/html/perakamwaktu/upmidsso/CAS.php(1062): CAS_Client->isAuthenticated() #2 /var/www/html/perakamwaktu/indexsso.php(48): phpCAS::isAuthenticated() #3 {main} thrown in /var/www/html/perakamwaktu/upmidsso/CAS/Client.php on line 3205