PHP Warning: Illegal string offset functions.php

[shka]

Recently done an update to php 7.x?

I think one of your hacks/addon's needs to be updated.

You have to disable them one by one until you aren't seeing the error. After that search for this addon here in this forum. There should be the solution.

Typicaly a string which is used as array. Then you should inititialize it as $xxxx = [];