Apple pay web. Requesting an Apple Pay Payment Session

Hello guys! We trying to integrate apple pay but we have a problem with TLS. Right now response from apple server  x509: certificate signed by unknown authority. We download certificate and export to .pem file.

Can someone help us with that?
Our backend written on GOlang, if you want i can show you code samples.

We are also same issue. have you got any solution ?

Apple pay web. Requesting an Apple Pay Payment Session
 
 
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