vis: fatal error - gateway HTTP 500: make-router requires at least one provider

[WZHKAWF]

Running vis results in a fatal gateway error when creating a session.

Error

vis: fatal error - gateway HTTP 500
clojure.lang.ExceptionInfo: gateway HTTP 500 {"error" {"message" "make-router requires at least one provider", "type" "engine-error"}, :http-status 500}
        at com.blockether.vis.internal.gateway.client$send_json_with_entry_BANG_.invokeStatic(client.clj:114)
        at com.blockether.vis.internal.gateway.client$send_json_with_entry_BANG_.invoke(client.clj:89)
        at com.blockether.vis.internal.gateway.client$send_json_BANG_.invokeStatic(client.clj:123)
        at com.blockether.vis.internal.gateway.client$send_json_BANG_.invoke(client.clj:118)
        at com.blockether.vis.internal.gateway.client$create_session_BANG_.invokeStatic(client.clj:304)
        at com.blockether.vis.internal.gateway.client$create_session_BANG_.invoke(client.clj:304)

Details

The gateway returns HTTP 500 with the engine error make-router requires at least one provider during create-session!. This suggests no LLM provider is configured/registered when the session is created.