cast_sender.js error: Failed to load resource: net::ERR_FAILED in Chrome

I recently started receiving the following console errors, without any code changes taking place.

I did not install any extensions recently.

Failed to load resource: net::ERR_FAILED chrome-extension://enhhojjnijigcajfphajepfemndkmdlo/cast_sender.jsFailed to load resource: net::ERR_FAILED chrome-extension://hfaagokkkhdbgiakmmlclaapfelnkoah/cast_sender.jsFailed to load resource: net::ERR_FAILED chrome-extension://enhhojjnijigcajfphajepfemndkmdlo/cast_sender.jsFailed to load resource: net::ERR_FAILED chrome-extension://fmfcbgogabcbclcofgocippekhfcmgfj/cast_sender.jsFailed to load resource: net::ERR_FAILED

I have several YouTube player embeds on the page that are triggering this error, but they are simple:

<iframe width="100%" height="100%" src="http://www.youtube.com/embed/OUR_YOUTUBE_ID?showinfo=0&amp;wmode=transparent" frameborder="0" allowfullscreen=""></iframe>

Has anybody else experienced this?