An uncaught Exception was encountered

Type: TypeError

Message: implode(): Argument #2 ($array) must be of type ?array, string given

Filename: /home/u1347553/public_html/application/controllers/Article.php

Line Number: 587

Backtrace:

File: /home/u1347553/public_html/application/controllers/Article.php
Line: 587
Function: implode

File: /home/u1347553/public_html/index.php
Line: 316
Function: require_once