When i changed the seed to Seed=RMGfL4UZ5b, your map was working fine, in fact, i explored it and i seen your map is awesome.
I forgot to mention: changing the seed of the map, does not unstuck your characters from the map, it just only creates another instance of the map in the server, so you can enter the map with another character and it will work.
Changing the seed of the map will create another instance of the map in the server, like if your map was another completly different map. Teorically will let you to play the map and anyone who has the same map seed, but it will not unstuck your characters neighter fix the issues of other members.
The "xxxxxx" i have put in the seed it was to avoid to make public the map seed.
You can choose any seed as you want, the are no limits.
I will ask to the staff about when is the next server restart. I keep in mind that the server is being overpopulated and all custom maps are having this issue.