Hướng dẫn fix lỗi please enter a valid callback method cho xenforo

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Trong library/xenforo/DataWriter/Page.php

Tìm:

if ($this->isChanged('callback_class') || $this->isChanged('callback_method'))

Thay bằng

if ($this->get('callback_class') || $this->get('callback_method'))

Xong
Nguồn:
[Hướng dẫn] fix lỗi please enter a valid callback method cho xenforo
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