Fix "The attribute publisher.itemtype has an invalid value" when author is publisher

Question

How to fix "The attribute publisher.itemtype has an invalid value" when author is also publisher?

Generaly I have an client who want hi-rate SEO website and he writte, print, sell and publish own books. Google not approve my setup and return me error in Schema.

UPDATE

Here is example of my problem I place publisher like "John Di Lemme Development Group". I do this via HTML codes, not use JSON LD for this.

Answer 1

Thanks to all but I find solution. Generaly I register company on Google Business Listing and after that place publisher and accept it. It's work well. Thanks!