Logstash error : no implicit conversion of nil into Integer

Elastic Stack Logstash
3

I tried what you told me but I still get the error, I don't know why?

filter {
 if [host] == "10.10.66.12" {
mutate { add_field => {"state" => 0}
    convert => {"state" => "integer"}
}
 mutate {
       convert => {
                        "MemoryTotal" => "integer"
                        "MemoryUsage" => "integer"
                        }
  convert => { "CPUTotal" => "integer" }
  convert => { "MemoriaUsadaTotal" => "integer" }
   rename => ["host","IP"]
   rename => ["iso.org.dod.internet.private.enterprises.3375.2.1.1.2.1.5.0", "Out"]
   rename => ["iso.org.dod.internet.private.enterprises.3375.2.1.1.2.1.3.0", "In"]
   rename => ["iso.org.dod.internet.private.enterprises.3375.2.1.1.2.12.6.0", "NewConnects"]
   rename => ["iso.org.dod.internet.mgmt.mib-2.system.sysName.0", "Sysname"]
   rename => ["iso.org.dod.internet.private.enterprises.3375.2.1.1.2.1.45.0", "MemoryUsage"]
   rename => ["iso.org.dod.internet.private.enterprises.3375.2.1.1.2.1.44.0", "MemoryFree"]
   rename => ["iso.org.dod.internet.private.enterprises.2021.4.5.0", "MemoryTotal"]
   rename => ["iso.org.dod.internet.private.enterprises.3375.2.1.7.5.2.1.27.1.48.1", "CPU1"]
   rename => ["iso.org.dod.internet.private.enterprises.3375.2.1.7.5.2.1.27.1.48.2", "CPU2"]
   rename => ["iso.org.dod.internet.private.enterprises.3375.2.1.7.5.2.1.27.1.48.3", "CPU3"]
   rename => ["iso.org.dod.internet.private.enterprises.3375.2.1.7.5.2.1.27.1.48.4", "CPU4"]
   rename => ["iso.org.dod.internet.private.enterprises.2021.9.1.9.1", "Disk1Usage"]
   rename => ["iso.org.dod.internet.private.enterprises.2021.9.1.9.2", "Disk2Usage"]
   rename => ["iso.org.dod.internet.private.enterprises.2021.9.1.7.1", "DiskFree"]
   rename => ["iso.org.dod.internet.mgmt.mib-2.system.sysLocation.0", "SysLocation"]
   rename => ["iso.org.dod.internet.private.enterprises.3375.2.1.3.2.3.2.1.2.1", "ChasisTemp"]
  }
 ruby {
    code => "event.set('CPUTotal', (event.get('CPU1') + event.get('CPU2') + event.get('CPU3') + event.get('CPU4')) / 4)"
  }
 ruby {
    code => "event.set('MemoriaUsadaTotal', event.get('MemoryUsage') / event.get('MemoryTotal'))"
  }
 }
  if [CPUTotal] > "40" {
   mutate {
    update => {"state" => "1"}
 }
}
  else if [ChasisTemp] > "45" {
   mutate { update => {"state" => "2" }
 }
}
  else if [MemoriaUsadaTotal] > "40" {
  mutate { update => {"state" => "3" }
 }
}
  else {
   mutate { update => {"state" => "0" }
  }
 }
}