Hello,
I bought the extension "Metabox Group" in the last few months and everything has worked fine until now.
The problem is that since this morning, all the sites on which I installed myself an error message in the pages or groups are ...
The message is: "Fatal error: Call to undefined method RW_Meta_Box :: get_class_name () in /home/pepites/public_html/wp-content/plugins/meta-box-group/class-rwmb-group-field.php on line 63 "
Can you tell me how to fix this?
(this problem blocking several of my sites, so it's really urgent...)
Thank you
.
