<?php defined('SYSTEMPATH') || exit('No direct script access allowed'); ?>

CRITICAL - 2021-03-29 22:26:39 --> Call to undefined function Phpcmf\Model\Form\dr_site_table_prefix()
#SQL：SELECT * FROM `dr_weixin_reply`
#URL：http://wz.entem.cn/admin.php?c=api&m=cache_update
#AGENT：Mozilla/5.0 (Windows NT 6.1 Win64 x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36
#REFERER：http://wz.entem.cn/admin.php?s=tag&c=home&m=index
#0 /wwwroot/xunruiCMS/dayrui/Fcms/Core/Service.php(241): Phpcmf\Model\Form\Form->__construct()
#1 /wwwroot/xunruiCMS/dayrui/Fcms/Model/Cache.php(146): Phpcmf\Service::M()
#2 /wwwroot/xunruiCMS/dayrui/Core/Controllers/Admin/Api.php(366): Phpcmf\Model\Cache->update_cache()
#3 /wwwroot/xunruiCMS/dayrui/System/CodeIgniter.php(931): Phpcmf\Controllers\Admin\Api->cache_update()
#4 /wwwroot/xunruiCMS/dayrui/System/CodeIgniter.php(427): CodeIgniter\CodeIgniter->runController()
#5 /wwwroot/xunruiCMS/dayrui/System/CodeIgniter.php(333): CodeIgniter\CodeIgniter->handleRequest()
#6 /wwwroot/xunruiCMS/dayrui/Fcms/Init.php(398): CodeIgniter\CodeIgniter->run()
#7 /wwwroot/xunruiCMS/index.php(50): require('/wwwroot/xunrui...')
#8 /wwwroot/xunruiCMS/admin.php(9): require('/wwwroot/xunrui...')
#9 {main}

系统报这个错误是什么原因