Anh Tran

Hi Pascal,

I answered you via email. Posting here in case anyone needs it:

I see you’re using the old syntax of Meta Box to register meta boxes. I’ve made the change to this: https://ghostbin.com/paste/d2k7b

Please try it.

Note that the way to register directly via class RW_Meta_Box is not supported anymore. While it might work in normal cases, it’s not compatible with other extensions. Please see the docs here: https://docs.metabox.io/creating-meta-boxes/

Let me know if you see any bug.