401 => Net::HTTPUnauthorized [...] WWW-Authenticate header missing in response

[iMilnb]

When trying to get balances from my Ibercaja account I get the following:

$ bundle exec bankscrap balance Ibercaja --credentials=dni:12345678 password:111222
Traceback (most recent call last):
        16: from /usr/local/bin/bankscrap:23:in `<main>'
        15: from /usr/local/bin/bankscrap:23:in `load'
        14: from /var/lib/gems/2.5.0/gems/bankscrap-2.0.6/bin/bankscrap:5:in `<top (required)>'
        13: from /var/lib/gems/2.5.0/gems/thor-0.20.3/lib/thor/base.rb:466:in `start'
        12: from /var/lib/gems/2.5.0/gems/thor-0.20.3/lib/thor.rb:387:in `dispatch'
        11: from /var/lib/gems/2.5.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in `invoke_command'
        10: from /var/lib/gems/2.5.0/gems/thor-0.20.3/lib/thor/command.rb:27:in `run'
         9: from /var/lib/gems/2.5.0/gems/bankscrap-2.0.6/lib/bankscrap/cli.rb:24:in `balance'
         8: from /var/lib/gems/2.5.0/gems/bankscrap-2.0.6/lib/bankscrap/cli.rb:82:in `initialize_client_for'
         7: from /var/lib/gems/2.5.0/gems/bankscrap-2.0.6/lib/bankscrap/cli.rb:82:in `new'
         6: from /var/lib/gems/2.5.0/gems/bankscrap-ibercaja-1.0.0/lib/bankscrap/ibercaja/bank.rb:16:in `initialize'
         5: from /var/lib/gems/2.5.0/gems/bankscrap-2.0.6/lib/bankscrap/bank.rb:30:in `initialize'
         4: from /var/lib/gems/2.5.0/gems/bankscrap-ibercaja-1.0.0/lib/bankscrap/ibercaja/bank.rb:37:in `fetch_accounts'
         3: from /var/lib/gems/2.5.0/gems/bankscrap-2.0.6/lib/bankscrap/bank.rb:59:in `get'
         2: from /var/lib/gems/2.5.0/gems/mechanize-2.7.6/lib/mechanize.rb:464:in `get'
         1: from /var/lib/gems/2.5.0/gems/mechanize-2.7.6/lib/mechanize/http/agent.rb:323:in `fetch'
/var/lib/gems/2.5.0/gems/mechanize-2.7.6/lib/mechanize/http/agent.rb:742:in `response_authenticate': 401 => Net::HTTPUnauthorized for https://ewm.ibercajadirecto.com/api/cuentas -- WWW-Authenticate header missing in response (Mechanize::UnauthorizedError)

My DNI and password are correct.

I would gladly help but my ruby level is near 0 :/