No sounds from FM8 FX (VST) and Reaktor 6FX (VST) on Maschine+

There are some NKS compatible FX in the User Library as I converted several myself

https://www.native-instruments.com/en/reaktor-community/reaktor-user-library/all/all/all/all/stephen%20wey/latest/1/all/?q=stephen%20wey&t=userlib

Try Laserbrew for example which is an awesome reverb, or Darkstar which is my fave Reaktor multi effect for FSU

https://www.native-instruments.com/en/reaktor-community/reaktor-user-library/entry/show/12493/

https://www.native-instruments.com/en/reaktor-community/reaktor-user-library/entry/show/11983/

and Bass Enchanter - a cool bass booster

https://www.native-instruments.com/en/reaktor-community/reaktor-user-library/entry/show/12507/