Add Media & Media Edit buttons do not work in Custom Post Types

This problem is happening in both Firefox and Chrome.

This problem was not fixed by enabling script_debug.

This problem was not fixed by disabling ALL plugins, except for the fact that the problem only happens with Custom Post Types, so I had to leave one plugin enabled in order to test.

The following errors were reported in Firefox:

TypeError: wp.media.view.settings.post is undefined load-scripts.php:328
TypeError: c.parent(…).offset(…) is undefined load-scripts.php:49
“Deprecated TinyMCE API call: <target>.onInit.add(..)” wp-tinymce.php:20
TypeError: d.view.settings.attachmentCounts is undefined load-scripts.php:281
TypeError: e is undefined load-scripts.php:291
TypeError: wp.Uploader is undefined load-scripts.php:281
TypeError: e is undefined load-scripts.php:291
TypeError: e is undefined load-scripts.php:291