Letsencrypt certificate verification failed after 09/30/2021

After 09/30/2021 I get certificate verification failed (DST Root CA X3 Expiration was on this date) when try auth
tornado.curl_httpclient.CurlError: HTTP 599: server certificate verification failed. CAfile: none CRLfile: none
i run jupyterhub on doker with treafic revers proxy and oauth authenticator (oidc keycloack)
jupyterhub 1.4.2
oauthenticator 14.2.0
OpenSSL 1.1.1f
Any ideas?

I add for fix

RUN apt-get update && apt-get install -yq --no-install-recommends \
    ca-certificates \
    libgnutls30 \
    && apt-get clean && rm -rf /var/lib/apt/lists/*