Ive change the stack sizes but everytime i start up my server it always says 

[Stack Size Controller] Acquiring vanilla defaults file from official GitHub repo and overwriting; https://raw.githubusercontent.com/AnExiledDev/StackSizeController/master/vanilla-defaults.json
Loaded plugin Stack Size Controller v4.1.1 by AnExiledDev

i've tried to change them again and just reload the plugin but still doesnt save