@adjteam I am also troubleshooting a seemingly unrelated issue and ran into this problem. I came to the same conclusion as you — the error occurs when the value of an ACF field is an array, not a string as WordPress is expecting.
Welcome
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users
We use cookies to offer you a better browsing experience, analyze site traffic and personalize content. Read about how we use cookies and how you can control them in our Cookie Policy. If you continue to use this site, you consent to our use of cookies.