How do I use the tutor-ecommerce plug-in as the payment engine for the certification certificate for the LMS course

I want to use the tutor-ecommerce plug-in as the payment engine for the certification certificate of LMS course, but after configuring the corresponding information, the following problems still occur.

Could you please give me the correct setting process so that I can use the tutor-ecommerce plug-in as the payment engine for the certification certificate of LMS course?

Change the ecommerce configuration information ‘PAYMENT_PROCESSOR_CONFIG’ field to ‘dev’ to fix the problem; But there are other problems, and the title and picture of the product cannot be shown, can someone help me? thank you