1. If you are getting an error 5.04, you need to check if the API keys are correct;
    You can do it by going to HUB -> Developers -> Channels

  2. Make sure that you are including the parameters "geo_country" and "google_pay_merchant_id" within your PaymentIntent. So the list of obligatory parameters will be the following:


  3. For H2H integration method: kindly check if the value of "gatewayMerchantId" parameter you send to Google contains the relevant API public key.

Also, below, you can find links to instructions on how to connect Apple Pay when connecting via:

If none of the above helps, please contact Solidgate Customer Service and provide all the steps you checked and the error you encountered.