Can not Log In - Error reference number: 502

I am trying to log in and I get always the following message and I am a paid (Plus) user.

Bad gateway

The web server reported a bad gateway error.

  • Ray ID: 7ab92515df2b0de2
  • Your IP address:
  • Error reference number: 502
  • Cloudflare Location: Santiago

I tried deleting cookies and also in other browsers and laptops but it is always same.
Any help?