> You only have 1 field group created on this site?
No, I meant that I have only one field group assigned to this post type.
And you were right. An another fields group (a field group containing a clone field) was assigned to an unexisting post. This caused the issue. I did it because I wanted to prevent a clone group from showing anywhere. I’ve even opened a feature request regarding this issue.
I’ve resolved this issue changing setting the clone field group to inactive and removing a condition that can never be meet.
But anyway, I think this is a bug that should be fixed. Even if a field group is assigned to an unexisting post then no error or notice should be displayed.
Thanks for your help.
