WYSIWYG Editor blank – debug fixes if left on

Hello,

I had a client contact me regarding an error where the visual editor appears to blank when editing an item. It isn’t actually blank – the text is there, but appears white. I narrowed it down to a JavaScript problem and turned on script debugging, which yielded this error:

jquery-migrate.js?ver=1.2.1:21 JQMIGRATE: Logging is active
E-v1.js:1 Blocked a frame with origin "https://fast.wistia.net" from accessing a frame with origin "https://donnasgeneralstore.com". Protocols, domains, and ports must match.b.elem.height @ E-v1.js:1a.Thumbnail.b.containerHeight @ E-v1.js:5a.Thumbnail.b.fitWithoutReload @ E-v1.js:5(anonymous function) @ E-v1.js:5d @ E-v1.js:5e @ E-v1.js:1(anonymous function) @ tinymce.min.js?ver=4205-20150910:3f.run @ tinymce.min.js?ver=4205-20150910:3f.add @ tinymce.min.js?ver=4205-20150910:3S.init @ tinymce.min.js?ver=4205-20150910:9(anonymous function) @ tinymce.min.js?ver=4205-20150910:9(anonymous function) @ tinymce.min.js?ver=4205-20150910:4n @ tinymce.min.js?ver=4205-20150910:2p @ tinymce.min.js?ver=4205-20150910:4(anonymous function) @ tinymce.min.js?ver=4205-20150910:4i @ tinymce.min.js?ver=4205-20150910:4

I’m not sure if this is related to a plugin or what. I have never seen this before. Any ideas? If I turn debugging off, the problem returns. We need a permanent fix for this. Thanks!