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A PHP Error was encountered

Severity: Notice

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

Filename: models/Site_model.php

Line Number: 233

Backtrace:

File: /var/www/html/KOL/voice/application/models/Site_model.php
Line: 233
Function: _error_handler

File: /var/www/html/KOL/voice/application/controllers/Exitpage.php
Line: 110
Function: get_keyword_cat

File: /var/www/html/KOL/voice/public/index.php
Line: 319
Function: require_once

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並前往 https://matters.news/@CHWang/machine-learning-%E6%A9%9F%E5%99%A8%E5%AD%B8%E7%BF%92%E7%AD%86%E8%A8%98-%E8%A9%95%E4%BC%B0%E8%BF%B4%E6%AD%B8%E6%A8%A1%E5%9E%8B%E7%9A%84%E9%87%8D%E8%A6%81%E6%8C%87%E6%A8%99-%E7%9F%A5%E5%B7%B1%E7%9F%A5%E5%BD%BC%E6%89%8D%E8%83%BD%E6%A7%8B%E5%BB%BA%E5%87%BA%E6%9C%80%E5%A5%BD%E7%9A%84%E8%BF%B4%E6%AD%B8%E6%A8%A1%E5%9E%8B-sse-mse-rmse-r-square-mae-mspe-mape-rmsle%E4%BB%8B%E7%B4%B9-bafyreif3m2yyrsvokyamcrt7lonfwn5gvjr6x34mvetipabahw2tqq3ha4

是否確定要離開？