Fatal Error on PHP 8.1 in Normalizer.php

Hello,

PHP Fatal error: Uncaught TypeError: strlen(): Argument #1 ($string) must be of type string, array given /plugins/official-facebook-pixel/vendor/facebook/php-business-sdk/src/FacebookAds/Object/ServerSide/Normalizer.php:42

It appears that the Normalizer only works on strings, but is being called somewhere with an array. While that call may be in error, I’ve patched it by adding an is_array check after the null/0 length check:

// If not a string, just return the data as-is
if (is_array($data))
{
return $data;
}

This may not be the best solution, but it prevents the crash. I hope that this helps and a more official solution can be added in the next release.

Thank you,

Kevin Hock