The following error is filling up our log files to the point of making them unreadable:
Warning: DOMXPath::query(): Invalid expression */var/www/cnn.com.com/gift-shop/var/log/exception.log*: [2017-08-04 1:31:19] main.ERROR: Exception: Warning: DOMXPath::query(): Invalid expression in /var/www/cnn.com/gift-shop/vendor/pelago/emogrifier/Classes/Emogrifier.php on line 269 in .../vendor/magento/framework/App/ErrorHandler.php:61
If I mute this I get a warning on the upcoming foreach after that line.
I assume muting that would continue this chain.
What can I do to begin debugging this?