i thought you said all the servers you tried issued this error, then its server's problem, specially when we talk for no-name servers, otherwise you need to be more spesific what server what os you have etc, because there are some remedies like the dlls for windows 10 etc.
something wrong with your events try to disable them
execution:java.lang.IndexOutOfBoundsException: Index 1 out of bounds for length 1
on your task of Death Match event something wrong there
make a program to spawn id for 5 seconds, then delete then spawn next id and so on.
while you do that make a script in windows to press screenshot
after a night of having all the screenshots
make a program to cut the images from a certain point x y to keep only the image of that monster