A PHP Error was encountered

Severity: Notice

Message: iconv(): Detected an illegal character in input string

Filename: helpers/custom_url_helper.php

Line Number: 766

Backtrace:

File: E:\Inetpub\vhosts\tgo.or.th\httpdocs\2020\website\controllers\Pages.php
Line: 411
Function: iconv_string

File: E:\Inetpub\vhosts\tgo.or.th\httpdocs\2020\index.php
Line: 316
Function: require_once