I have a few questions.

* If I add a field with WooCommerce TM Additional Product Options the add to card button disappears. I unchecked  the required option in Product Options.

I have the last udate of WooCommerce TM Additional Product Options 4.4.

* If I Envato Item Purchase Code fill the bottom of settings I get the message, The Envato Item Purchase Code is not correct! Please enter a valid one in order to auto-update. I have cut and pasted code so there is no mistake in it.

* Is your plugin working with WooCommerce Single Product Page Builder? if so what do i have to change.

Kind regards

TM Additional Product Options is not officially supported and we have no experience with it, sorry. Maybe someone from the community can help you.

The problem with updating the fancy product designer is solved.

The first problem is not solved with the new update, do you have a suggestion?

I am using "TM Extra Product Options" and I have no issue with it
I think the problem is caused by another plugin and something like this 

Thanks for your response.

I made a working product with the fancy product disigner.

If I add a field (upload File), the shopping card disappears and isn't coming back until I add a file, even if i unchecked  the required option for that field.