This is the issue I am having, but with the refining feature of it only applies to logging into my home sim. Or rather, this is the error message I get when I try. I can log into every other sim I've attempted, just not home. And when I try and tp home, I get a very weird long logout. The sim I am on slowly dissolves and I am left suspended over bare land, until eventually I get the 'you have been logged out' message.
It happens after LL restarts and upgrades, and it resolves after a second restart of my home sim.
I've tried all the fixes mentioned here and elsewhere about everything from router through connection, isp, viewer type, everything I can think of.
If anyone has any other suggestions not commonly mentioned or listed above, I would appreciate it. On my seventh support ticket, and since I am told its my issue, I am finding it harder and harder to get the restart of my home sim that seems to clear the problem for me.