A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: index/about.html

Line Number: 14

Backtrace:

File: /www/wwwroot/rand.net.cn/branch/application/views/index/about.html
Line: 14
Function: _error_handler

File: /www/wwwroot/rand.net.cn/branch/application/controllers/Home.php
Line: 531
Function: view

File: /www/wwwroot/rand.net.cn/branch/index.php
Line: 315
Function: require_once