… this could be a PHP Unicode setting.
Try to turn off
detect_unicode in your
You can simply try this by running n98-magerun like this:
$> php -d detect_unicode=Off n98-magerun.phar
If question marks are gone the problem is solved.
The PHP issue also affects some popular tools like composer or phpunit.
Settings can be persisted in php.ini or you can create an alias on your system.