The issue is mostly resolved now. We are still seeing smaller issues related to the Calendar Feed URL in Settings, or Avatars of users not loading. Those will also be fully resolved shortly.
Posted Feb 06, 2018 - 17:32 CET
We are currently seeing problems with loading the Wunderlist Web App in the Browser and Signing in to Wunderlist. Our engineering team is working on getting this issue fixed as quickly as possible. Thank you for bearing with us and apologies for any troubles this might cause you.