I have had the same error all day I have called support and everything trying to fix it and I still get it.
I am not sure what to do or think. I know its not my isp like support keeps claiming. I also had this happen 2 days ago late night and just gave up but day after all was fine. I am baffled and ticked.
Ok I think I figured it out.
This issue seems to have something to do with the Harbour Studio apartment. I managed to get on Home by going to another space, however when I tried to load the studio space I got booted with the D31 Error again, if I didn't know any better I'd say that space has been hacked.
its not just harbor i tried like 5 diff spaces still kept getting the error so i gaveup
Following on from another thread, the Harbor Studio personal space will also kick you with a D 31 if you try to load in to it. Just before the kick, you get a screen displaying a blue sky with clouds. I tried to enter the Harbor Studio space at 3:56 p.m. EST.
I have been having this issue too. Was able to get into my Masquerade Hall space and then Avalon Keep. Played the dragonfly game there just fine. Tried to go to another personal space and got hit with D31. Have been getting D31s every time I try to leave Harbour Studio since.