0 - [] operator not supported for strings

[edwin@.....tk]

I have installed the latest version (2.0.385) on a website with Joomla 3.9.8
On a PHP 7.2.19 environment

When i goto the cart on the front end i get the following message:
0 - [] operator not supported for strings

Further there is no information or checkout page anymore.

I know this is an error that appairs to be related to PHP 7, but i also need to update the PHP version on my server for all kinds of other reasons

[admin]

hello, to find out which extension is causing this issue, you can install our fatal catcher from opc extensions and enable it in joomla plugin manager.

as far as i remember "custom filters for all" could had caused this issue and some other 3rd party software. the fatal catcher will let you know the path of the file which causes the problem, so you'll know which extension to upgrade or disable.

best regards, stan