Did you had any issues with Payment method setup? I am unable to setup PayPal Smart button and FirstData Payment Gateway and I believe it is something to do with the proxy settings. I have tried with the below settings and am still unable to configure the payment methods.

[email protected] wrote:
UPDATE:I have found this link https://www.ionos.es/ayuda/hosting/net/ejemplos-de-scripts-para-establecer-conexiones-http-externas-hosting-windows/.
I think ionos setup actively refuse external http request.
I have change proxysettings in database:
proxysettings.enabled:true
proxysettings.address:http://winproxy.server.lan
proxysettings.port:3128
proxysettings.preauthenticate:false
also i have change
//client to request current store
  services.AddHttpClient<StoreHttpClient>().WithProxy();
in AddNopHttpClients method in ServiceCollectionExtensions
revert store url to https://xxxxxx all scheduled task are running ok.
Perhaps someone of nopcommerce Team could give his opinion?

sorry for my english