WYSIWYG field is missing toolbar buttons

Overview

If the WYSIWYG field is missing the toolbar buttons, it is most likely that you have a Javascript (JS) error on the page. Any JS error on the page will prevent ACF from creating the WYSIWYG tinyMCE editor. Bellow are some screenshots to demonstrate how the WYSIWYG field can appear.

To solve the issue, please open up the inspector (in chrome / safari) or firebug (in firefox) and select the console tab. Refresh the page and take note of any red JS errors that appear.

Most JS errors can be solved by editing the problematic script, however, some JS errors occur due to conflicts between plugins / themes. Please take note of the file that causes the error and contact the relevant developer.