GM pls help me my skill of call homunculos are always been failed

im guessing your homun died without you noticing it? have you tried Ressurect Homonculus skill? or maybe you were out for more than 2hours --lets say @autotrade or @afk maybe?

Did you already have a homunculus or need one?

If you need one, make an embryo and use Call Homunculus.

(Embyro making guide can be found here: https://abstractonline.forumotion.net/tutorials-f13/embryo-making-guide-t16.htm )