The action you have requested is not allowed in codeignitor

The easiest way to ignore this is to add the url you want to exclude in config.php.

To do this ,

Go To application -> config -> config.php

Now search for the following "csrf_exclude_uris"
Then add your url into the excluded urls list like

$config['csrf_exclude_uris'] = 'admin/updatevpassword','admin/submitnewpassword';