auth0-WinFormsWPF-oidc-samples: access denied, service not found

Hi, I’m using the WinForm sample (auth0-WinFormsWPF-oidc-samples) but for some reason, I’m getting from the logs:

"message": "Service not found: [clientID]",
"oauthError": "access_denied",
"type": "oauth-authorization"

Where [clientID] is my application’s ID. All looks okay.

I understand this is a community-maintained library, so I wasn’t sure if this was a bug, or something I misconfigured on my end, or if the library just no longer works. Any pointers or tips on where I can just get the sample to work?