WCFM Multivendor Marketplace Startup

I am launching a WCFM marketplace in the coming weeks (hoping to complete fixes this weekend) and need a bit of help with some setting. I have already added all the necessary plugins and it is mostly clicks of buttons (no coding) and just configuring settings of my WCFM marketplace. This will likely be the first of many issues I’ll need help with in the coming week/month/years running this marketplace so hoping for a long-term relationship. Shipping Options I want there to be 3 delivery options available for vendors. Local collection, vendor delivery and Royal Mail in the UK (separate plug-in wp-ruby). I have also installed the delivery app which I will look at configuring later. Payment Options I want there to be 2 payment options for vendors. Split pay with both Stripe and PayPal. I have already configured the APIs and they may already be working. I have tested stripe with a vendor but had trouble when they tried to connect: {"error":{"message":"No application matches the supplied client identifier"}} Possible Coding I have a plug-in conflict as here: jwt-authentication-for-wp-rest-api (needed for Store App). This came with the settings of the JWT Authentication for the store manager app.