MyBB Internal Error

MyBB has experienced an internal error and cannot continue.

Error Type:
(8192)
Error Message:
Function set_magic_quotes_runtime() is deprecated
Location:
File: inc/class_core.php
Line: 163
Backtrace:
File Line Function
/inc/class_error.php 171 errorHandler->output_error
[PHP]   errorHandler->error
/inc/class_core.php 163 set_magic_quotes_runtime
/inc/init.php 51 MyBB->MyBB
/admin/index.php 18 require_once