I’m facing a strang issue with keycloak.

My application is in .Net 8. I managed, 2 years ago, to make it work with keycloak on docker in my dev environment and now I’m trying to make it works with keycloak on cloud iam.
I create realm, client, configure openid, add openid in my aplication (since 2 years we removed keycloak).
I when I hit an authorize attribute into a controller, keycloak login page is called, I logged into keycloak and came back to my callback login page, but .net throw an error in AuthenticationHandlerProvider->GetHandlerAsync :

IDX10000: The parameter ‘token’ cannot be a ‘null’ or an empty object. (Parameter ‘token’)

I’m not capable to understand why I have this error.

Someone could help please?