Exception class: TypeError()

implode(): Argument #1 ($pieces) must be of type array, string given

File: C:\xampp\htdocs\system\pages\spells.php
Line: 41


Backtrace:

#0 C:\xampp\htdocs\system\pages\spells.php(41): implode(', ', NULL)
#1 C:\xampp\htdocs\index.php(310): require('C:\\xampp\\htdocs...')
#2 {main}