I got the same error. This is becasue you did not select “assignments”, i.e. where the metabox is to be displayed.
Hmmm… but I did select the “assignments”. Look in my screenshot and you can see I selected “Topics”.
Also, the error message says that label is required. However, there isn’t anywhere in the UI to put in a label that I can see (also shown in the screenshot.)
Ok, now select a field and it should resolve it. It seems that you cannot have an empty metabox.
Thanks… got it to work. The problem was that I missed the “Post Title” field at the top of the settings dialog. That apparently is what was referred to as “label” in the error message. So I added a Post Title and it seems to be working better.
Hi @normsash and thanks for using this awesome plugin ♥️
Thanks for your feedback, on the next release we change the error message to increase the understanding.
Dont forget your 5 stars review 😁