It was funny timing for me when Steam went down - just was creating a new character and it wouldn’t let me… so thought something on my end and sort of panicked until I checked Twitter.
As a sidenote, got the Error 21 a couple hours earlier too.
I had that happen to me on ps4 earlier today when I was on scholatin. Couldn’t get to my home beacon on Sorissi or get to Circa(tnt). I did a restart of boundless and that fixed it for me tho.
Here I was thinking it was on my side. Almost half an hour of restarting, checking connection, getting all kinds of errors from either Boundless or Steam itself.