You should be able to join again. I did have to restore your area to a copy from an outdated backup. I believe I was able to replay most of the changes you've made since that backup, though. The chests were a little tricky, so please tell me or another staff member if you're missing any items.
Edit: It looks like the server is still crashing when you join. I'm a little confused because I'm able to go to the same area that you're currently in without any issues. Since the error has to do with the chunk you're in, it seems like it should crash when I enter it too. I've just deleted your player file, which might help.
Edit 2: Since deleting your player file worked, I'll delete Sarah's too.
You said you were able to go back to where you were after I deleted your player file. Did it crash as soon as you tried to do one thing in particular, or was it seemingly random?
I'm not really sure when this will get fixed. The fastest solution might be for us to move your house somewhere else. I would then delete your player files again so that you could join, and you could both be teleported to the new location. I can't get on now, but Dax can move your house if you're good with that solution. I'll actually go ahead and delete your player files again because Dax doesn't have access to do that.