Does anyone know how to fix that

Look down, and try it

Look closer to you or change your max spawn distance, 

/nomini    = the mini cocpter is too far

/mymini =the mini cocpter is too far

why?

hey man do you need an update players are spawning minis and within 30 minutes theres disapearing and then when they try to use /fmini or/nomini or /mymini it says its to far away.

ive fully removed the plugin 3 times
the data file several 
i o.reloaded each time

all the same result its def not working proper?

Did anyone figure this out? I'm having the same problem.

The MaxNoMiniDistance config option determines how far away from your mini you are allowed to use /nomini or /fmini. If you are seeing this error and want to be able to despawn or fetch the mini from farther away, increase the value or set to -1 for infinite distance.