Admin Panel error

[RaikND]

First error:

Severity: Warning
Message: file_get_contents(): php_network_getaddresses: getaddrinfo failed: Name or service not known
Filename: controllers/admin.php
Line Number: 224

code:

	public function isBlacklisted() {
		$ide = new IDE;
		$ide->requireAdmin();
		echo file_get_contents(API_SERVER."/isBlacklisted.php?key=".API_KEY."&pass=".API_PASS);
		$ide->system_stop();
	}

and more... in admin.php, i use 198 svn and i try to replace admin.php, admin_model.php and security.php from svn 221 and doesnt working