The % operator is not working in some server

Summary

The % operator is not working in one of my server. In the example i tried to output these operand as message <caster.var.SpiderCB> is int and 2 is also int both operand are integer

mythicmobs premium dev 4037 paper 1.18.1 203

Steps to reproduce

1. use any type of skill that require % operator
2. thats it, all of the skill with such operator cannot be used, will produce error in my server

crossbow_change_mode:
  Conditions:
  - crouching true
  Skills:
  - variableadd{var=caster.SpiderCB;amount=1} @self
  - variableMath{var=caster.SpiderCB;equation="<caster.var.SpiderCB>%2"} @self #<-------------
crossbow_int:
  Conditions:
  - variableisset caster.SpiderCB false
  Skills:
  - setvariable{var=caster.SpiderCB;value=0;}

Current behavior

error log https://mclo.gs/rleARzu

show error when this skill is triggered

Intended correct behavior

it should able to use without any error

Server log file

*this log is not the same log as the error one because i have tried multiple server and mythicmobs versions, but is still the same it just show they are in the same server https://paste.gg/p/anonymous/1b9724acf64d4eccae3d27cb5c8d3704

Debug log snippet

this is already a debug 5 message https://mclo.gs/rleARzu

Proposed fixes

idk what is causing this, same skill , files in different server, some server works, some server not working