I have a blocking issue with Metabox custom fields.
I have created 4 Field groups, each with several fields inside. Everything was fine at creation time but now, when I try to edit them I got the message
"Loading settings please wait"
and then the custom fields created do not show. The only thing that shows is Field group Name.
So I am unable to modify the custom fields.
Export function and add new (custom created) content seems to work.
Php error log does not show any error. Debug is Active.
I am using latest WordPress, Metabox AIO, Apache and Php 7.4. No other plugin or theme.
CPT and Custom fields are made using the interface (not exported in php)
Does anyone have a clue of what I can do to overcome the issue ?