Unable to load Dynamic Library

[ghost]

I need some help.
I installed easyii with Mysql, why do i get this error on bottom of admin, its a clean install dev branch. Any clue?
Also, by this situation maybe:

• save admins not working
• can't clear cache or assets.

PHP Core Warning – yii\base\ErrorException

PHP STARTUP: UNABLE TO LOAD DYNAMIC LIBRARY '/USR/LOCAL/LIB/PHP/EXTENSIONS/NO-DEBUG-NON-ZTS-20121212/PDO_DBLIB.SO' - /USR/LOCAL/LIB/PHP/EXTENSIONS/NO-DEBUG-NON-ZTS-20121212/PDO_DBLIB.SO: CANNOT OPEN SHARED OBJECT FILE: NO SUCH FILE OR DIRECTORY
2. yii\base\ErrorHandler::handleFatalError()
$_COOKIE = [
'_identity' => 'd03a20385afa18455ddd06c8d57f58820fc62087d02bc30c4638704ee47035e3a:2:{i:0;s:9:"_identity";i:1;s:46:"[0,"EHz9lBpFyqrNv-Z0zZXO6JOoV_AhpMBL","86400"]";}',
'PHPSESSID' => '87b4cf751386e52573d69aa091ccdaf2',
'_csrf' => '8f96070d92b7b066080f42b4c92a393a65b55bd78583ddc357bab5111d83dee6a:2:{i:0;s:5:"_csrf";i:1;s:32:"6rRM1CdoFAANTtDrEDm17ueyqn14jhwo";}',
];

$_SESSION = [
'__flash' => [],
'__returnUrl' => '/admin/settings',
'__id' => 0,
'__expire' => 1476830488,
'admin_return' => '/bda/admin/settings/index',
'entity_return' => '/bda/admin/entity/items/index/1',
'page_return' => '/bda/admin/page/a/index',
'carousel_return' => '/bda/admin/carousel/a/index',
];
Yii Framework
2016-10-17, 20:41:28

Apache
Yii Framework/2.0.8-dev

[ghost]

Temporary Solved!
Explanation:

1. my server does not have PDO_dblib.so
2. only use Mysql.
3. warning error still exists

My temporary solution:

Comment out on app/controllers/siteController.php
...
public function actions()
{
/return [
'error' => [
'class' => 'yii\web\ErrorAction',
],
];/
}
...