Connected system Integration via OpenID Connect

Hello people!

I'm trying to use OpenID Connect with my connected system. I have already configured OpenID Connect on my Admin Console, and it is alright, but when I try to use it in my connected system, I receive the following message: "Neither an access token nor a refresh token was found for the OpenID Connect provider." I have a question about this: Does the connected system in Appian use a POST client_secret_basic or client_secret_post?

• client_secret_basic: The client secret is sent as part of the HTTP Basic Authentication header.
• client_secret_post: The client secret is included in the body of the POST request.