AHHA! You are correct it has disabled itself maybe when i updated it? i have not been near them settings, one issue do you have plans to make it responsive?
I just installed this and found the same issue, i see no support as per usual from its creator so i fixed it myself and will share with you, if you go into /wp-content/plugins/amp-toolbox/amp-toolbox.php and remove lines:
$text = str_replace('[title]', preg_replace('/[^a-Z0-9-. ]/', '', $post->post_title), $text);
from line 409 and 457
once i did that and saved the file it takes away the error and the plugin still works just fine 😉 Example: http://battlefieldinformer.com/battlefield-1-elite-classes/
thank you for your quick response 🙂
