Server crashed when going over a certain area then has started saying java.lang.StackOverflowError when going back into the map

We have a broken part of our map (explained fully in https://bugs.mojang.com/browse/MC-215443 )
We built far and around the broken zone so we didn't keep having the problems but we have ended up having really bad frame lag in other spots of the map too and today (13th Febuary 2021) we ended up having the error code Java.lang.stackoverflowerror when we loaded into the map. 

( [21:29:50 WARN]: Can't keep up! Is the server overloaded? Running 2127ms or 42 ticks behind )

Update: (21:57) Cannot load map at all. Give me the same as above then force shuts down the server program .

I would love this map to be fixed ASAP so we can keep using it with all of our stuff built on it so we don't lose weeks of progress  

I have a link to the world.zip file if necessary.