Fantasy World Style Maps Wiped Themselves Blank During Upgrade

I have encountered an issue with the Fantasy World Style map design. Any

and all maps that were made in that "Style" are now going blank with

nothing but the background terraforming left. it is all wiped out. The

thumbnails on the Scenes web page look normal. But whenever we open a

map for the first time one of the loading bar prompts says "Upgrading

Map" which has not happened before.

Recovery and Cloning does not work, I am not the only one who has

experienced this issue as a Collaborator was what alerted me to it.

Clearing cache did not work, I use a different browser than my

collaborator and it's the same problem. This problem does not occur when

opening any other style of map. Unfortunately, both me and my friend

have done most of our work on the Fantasy World style. This means we

cannot open or edit any existing maps we haven't already touched for

fear of wiping them too if this proves to be irrevocable.