Unable to Logon with Authentik OIDC

[psybernoid]

I'm attempting to log ontgo OG using Authentik as an identity provider.

Relevant compose environment variables:

OG_OIDC_PROVIDER_NAME: Authentik
OG_OIDC_CLIENT_KEY: Client ID from Authentik Provider
OG_OIDC_SECRET: Client secret from Authentik Provider
OG_OIDC_DISCOVERY_URL: https://auth.mydomain.com/application/o/opengist/.well-known/openid-configuration
OG_OIDC_GROUP_CLAIM_NAME: opengist
OG_OIDC_ADMIN_GROUP: opengist-admins

When attempting to log on I just get the following in the logs:
opengist | Using environment variables config: OG_OPENGIST_HOME, OG_DB_URI, OG_OIDC_PROVIDER_NAME, OG_OIDC_CLIENT_KEY, OG_OIDC_SECRET, OG_OIDC_DISCOVERY_URL opengist | 11:58:39 WRN internal/web/handlers/auth/password.go:132 Invalid HTTP authentication attempt from