PHP warning: Undefined array key "xrouting-debug"

[devWhitevision]

The problem is that the code is trying to access the array key xrouting-debug in the $_REQUEST array, but this key does not exist. This leads to an ‘Undefined array key’ error.

To correct this error, you should check whether the key exists before accessing it. You can do this with the isset or array_key_exists function. Here is a possible solution for your code:

Line 146:
if (isset($_REQUEST['xrouting-debug']) && $_REQUEST['xrouting-debug'] == '1' && $modx->getOption('xrouting.allow_debug_info', null, false)) {
Tested on Modx 2.8.7, PHP 8.1.x, System setting xrouting.allow_debug_info = No;

Best regards,
Stefan