Guild hideout bricked. Can't be entered by any guild members, fails to load.

Hi!

First, I'm really hoping that a manual intervention by GGG staff can help us get our hideout back to an useable state. Guild name is Conflux. Anything would be highly apprecieated!

This is an issue that I believe is related to the bug covered here.

What causes the initial issue covered in the thread linked above, I don't know, but this is how it happens:

Step 1. Enter a fresh hideout through Helena. We used Celestial Nebula Hideout.
Step 2. Import a hideout preset. We started by looking at this hideout.
Step 3. Reclaim all, import a new hideout. The second one we checked out was this one.

This is where we first encountered the bug in the thread linked above. As soon as I, the guild leader, leave the instance (it might need to be completely empty of players too) I get disconnected and sent to the login screen. Upon reentering the hideout, it will now be an amalgam of the two previous hideouts, both overlapping each other.
We were unable to find any solution to this.
Reclaiming all would remove everything as expected, and you can leave without disconnecting. However, the next time an instance is created, the hideout will have reverted to its previous broken state.
I believe the disconnects only affect the guild leader. However, at this point you appear to be able to come and go as you please, the disconnect does not occur again unless another reclaim/import is done.
Here's how we made it worse.
We thought it was rather funny how krangled it was, so we wanted to see what happened if we kept going.

Step 4. Reclaim all, import a third hideout. We tried this one. I get disconnected upon leaving. It is now an amalgam of all three hideouts, as is apparent when you reenter the hideout.

Step 5. Reclaim all, import a fourth hideout. For this one we used one created by a guild member. I left the hideout and got disconnected as was expected. You are now unable to enter the guild hideout again. When you try and teleport to it, you get the expected "Entering Celestial Nebula Hideout", though after roughly 5 seconds it fails and you get the error message "Error: Failed to join any instances." This affects every guild member.

Congratulations, you've now bricked your guild hideout.

We conveniently saved the last viable hideout state, the one achieved by step 4. If the export worked correctly despite the bug, that is.
It can be downloaded here

UNLESS YOU ARE GGG STAFF WORKING ON THIS BUG, DO NOT DOWNLOAD THIS HIDEOUT, DO NOT IMPORT IT, YOU RUN THE RISK OF BRICKING YOUR HIDEOUT.

Edit, guild member took a screencap of our last "usable" hideout:
https://ibb.co/3Wj10DQ

heeeeelp

sad bump