Shibboleth 3.3.3 and Duo MFA Issue

[Alexandre Adao]

I am running Shibboleth Idp version 3.3.3. I am trying configure Shibboleth
with Duo MFA. I followed the instructions from both sources:
https://mimoto.co.uk/shibboleth-idp/duo/mfa/2017/06/01/duo-mfa-in-shibboleth-idp.html
and
https://wiki.shibboleth.net/confluence/display/IDP30/DuoAuthnConfiguration

The idp-process.log shows that I am having problems as follows:

WARN [net.shibboleth.idp.authn.impl.PopulateAuthenticationContext:198] -
Profile Action PopulateAuthenticationContext: No authentication flows are
active for this request

INFO [net.shibboleth.idp.authn.impl.SelectAuthenticationFlow:294] - Profile
Action SelectAuthenticationFlow: No potential flows left to choose from,
authentication failed

Any help, it will be very appreciated.

Thanks,

--Alex
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