Shopify integrate

Welcome
I have a problem with Shopify integration
,
I received the following error:
30

I have set the API admin access token
From shopify at Password / Access Token at erpnext

Is this correct ?

This issue is related to your Sales Invoice Doc, nothing to do with API.
In order to fix this,
Open Customize Form, and Select Sales Invoice. It will list all fields in Sales Invoice Doc. Check the Row No 5, In this row, you are probably using a Linked Field and You have set a non existent doctype in Options field.

thanks