You can also download the engine manually and put it in the desired folder:
https://github.com/CheshireCaat/browser-with-fingerprints/issues/36#issuecomment-2417328492
I can't use the FingerPrints. 
@raselalzakaria Good afternoon, please read this thread - https://community.bablosoft.com/topic/29016/error-fingerprintswitcher-key-is-missing/1