If you're continuing from the previous chapters, you will already still be in the Connect Settings page. If not, you can go here:
You will need to allow OAuth for Stripe KYC management. This can be found in Integration > OAuth Settings.
Please enable OAuth for Express accounts.
The next step would be to configure the Stripe Redirection that is used after Vendors set up their KYC through their Profile creation. This can just be added through the Stripe account in the same Connect Settings area, Integration > Redirects > + Add URI
Here you need to add your own URL for your marketplace backend in this format:
http(s)://{admin-project-host}/{admin_url}/omnyfy_vendor/vendor/index
EG:
This will redirect vendors back to this URL after they complete their KYC. This is important as this will determine if your account is linked to the marketplace or not.