Not a bug: Icon_image_error

[delia]

2.0.1, php 8.3.8
I do know what generated the problem but message stack is glitching trying to display and simply stops due the message_stack.php file.

PHP Fatal error: Uncaught Error: Undefined constant "ICON_IMAGE_ERROR" in /includes/classes/message_stack.php:167
Stack trace:
#0 /includes/classes/message_stack.php(30): messageStack->getDefaultFormats()
#1 /includes/autoload_func.php(47): messageStack->__construct()
#2 /includes/application_top.php(253): require('/home...../2...')
#3 /index.php(25): require('/home/...../2...')
#4 {main}
thrown in /includes/classes/message_stack.php on line 167

that line is

 'error' => [
                'params' => 'class="messageStackError larger"',
                'icon' => zen_image($template->get_template_dir(ICON_IMAGE_ERROR, DIR_WS_TEMPLATE, $current_page_base,'images/icons'). '/' . ICON_IMAGE_ERROR, ICON_ERROR_ALT),
            ], 

and there is no define for that beyond english file for error.png

The subsequent lines also define icons so it potentially affects more situations.