Type Error with `RpcServer.layerHttpRouter` and `SessionContext` in Middleware

Argument of type 'Layer<never, SqlError | ConfigError, SessionContext | HttpRouter>' is not assignable to parameter of type 'Layer<never, SqlError | ConfigError, HttpRouter | Request<"Requires", any> | Request<"GlobalRequires", any> | Request<"Error", any> | Request<...>>'.
  Type 'SessionContext | HttpRouter' is not assignable to type 'HttpRouter | Request<"Requires", any> | Request<"GlobalRequires", any> | Request<"Error", any> | Request<"GlobalError", any>'.
    Type 'SessionContext' is not assignable to type 'HttpRouter | Request<"Requires", any> | Request<"GlobalRequires", any> | Request<"Error", any> | Request<"GlobalError", any>'.ts(2345)