uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' on codeigniter

[jomeldicen]

I got this error when I updated the php to the latest version from 5.3.1 to 5.3.21

Fatal error: Uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' in /file location here server...../system/libraries/Cache/drivers/Cache_file.php:91

Stack trace:
#0 /file location here server...../system/libraries/Cache/drivers/Cache_file.php(91): serialize(Array)
#1 /file location here server...../dicenpad/libraries/Cache.php(71): CI_Cache_file->save('c8687873129ad34...', Array, 60)
#2 /file location here server...../dicenpad/libraries/Rest.php(99): Cache::save('user?PTGI-API-K...', Array, 60)
#3 /file location here server...../dicenpad/modules/uat/controllers/uat_controller.php(50): REST->get('user', Array)
#4 [internal function]: Uat_controller->client_login()
#5 /file location here server...../dicenpad/core/MY_Controller.php(63): call_user_func_array(Array, Array)
#6 /file location here server...../dicenpad/third_party/JCCodeIgniterModular.php(333): MY_Controller->_remap('client_login in /file location here server...../system/libraries/Cache/drivers/Cache_file.php on line 91

[whatthejeff]

I think this is a dupe of #254. Please reopen if I'm mistaken.