Install plugin and verify your domain using files from .well-known folder.
You need to create the folder ".well-known" in the nopcommerce root folder or into the folder "wwwroot".

Example

    Apple Pay
    https://yourstore.com/.well-known/apple-developer-merchantid-domain-association
    Let's Encrypt
    https://yourstore.com/.well-known/acme-challenge/{nameoffile}      

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