At 8pm UK time, we pushed a server update, which took about 30 minutes. In that time, nobody could log into multiplayer, sorry for the inconvenience. The aim was to improve mutliplayer stability as we've had issues this weekend (see previous post).
The update took a little longer than usual due to it failing on the first deployment but we fixed it and now the game does appear to be performing better. We will continue monitoring it but, at the moment, we have ~130 people online and no issues.
Since we're waiting to hear back from our server provider, Fly.io, we don't have a clear idea of what the issue was. They announced their own issues at the same time as our server was crashing but we can't be sure it's related without their input.
We felt we should try some experimental changes in the meantime, chiefly turning off various logging functions and also multiplayer notifications. We will turn this stuff back on soon, one by one, and check what, if anything, is at fault.
Predictably, turning stuff off has reduced load on the server so that probably explains the improved stability. We will be keeping a close eye on it. When we speak to Fly.io, we'll also ask about any hardware upgrades, which might help in future, if player numbers keep going up.
Thanks for bearing with us!