As mentioned the team is aware of the login issues with Error 10010 that started earlier today. We have discovered the cause and are now testing a fix so we can hopefully have this resolved shortly. We will continue to keep you updated!
Until then, there is a work around that you’re welcome to try until the fix is deployed.
Go to your Steam settings → Beta participation under Account tab → change Beta participation to Steam Beta Update
We super appreciate your patience and understanding with this!
If you’re continuing to experience this, could you please let me know what region you’re in, what version of Steam you’re using and if you’re using GFN?
At least the Devs can now check whats going on, finding the issue is half the fix.
Ipv6 is rarely used in private networks, and I don’t know any application which needs it currently.
None of the solutions mentioned worked for me. This should only be a temporary fix, but I managed to solve it by disconecting from ethernet and entering the game with my moblie hotspot, once inside swap again.