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Support › General › ✅My custom metabox stops working on WP 4.9.8 › Reply To: My custom metabox stops working on WP 4.9.8
Thank you! I had to make a couple of modifications to what you posted, but your changes definitely helped! Posting the final(ish) version here in case someone else ever runs into this.
https://ghostbin.com/paste/ytadu