valid callback error

Started getting the following error as of yesterday:

[20-Dec-2016 15:54:12 UTC] PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, class ‘Media_Credit_Admin’ does not have a method ‘enqueue_media_credit_scripts’ in /wp-includes/class-wp-hook.php on line 298

I updated my theme files this morning, and it looks like Yoast updated yesterday, but neither of those affect class-wp-hook.

Any ideas?