Hướng dẫn fix lỗi XML Parsing Error: not well-formed for JohnCMS 4.4.x

[AdminAdmin is verified member.]

Vào incfiles/head.php
Tìm

if(stristr(core::$user_agent, "msie") && stristr(core::$user_agent, "windows")){
code
} else {
code
}

Thay bằng

if(stristr(core::$user_agent, "msie") && stristr(core::$user_agent, "windows")){
// Выдаем заголовки для Internet Explorer
header("Cache-Control: no-store, no-cache, must-revalidate");
header('Content-type: text/html; charset=UTF-8');
}