We're not able to consistently reproduce this error on YouTube. Could you check to make sure your filter lists are updated? If the issue persists after updating your filter lists, please reach out to us at help@getadblock.com and be sure to include your debug data: https://help.getadblock.com/support/solutions/articles/6000087856. In the meantime, reloading the page seems to be the fastest way to dismiss the error message (disabling EasyList will stop the error but will also allow ads to appear). --AdBlock Support