I have the same error message with acf 5.0.5. But in my case one of my WYSIWG fields on a options page isn’t showing any of the regular buttons and the text is inverted to white on a white background. :/
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users
Accordions are a great way to group related information while allowing users to interactively show and hide content. In this video, Damon Cook goes in-depth on how to create an accessible accordion block using ACF PRO’s Repeater field.https://t.co/RXT0g25akN