Error getting iMessage to work

Hi Y'all

My Hackintosh setup on High Sierra 10.12.6 works perfectly other than the fact that I can't for some reason get iMessage to work. I've tried the iDiot's guide, some guides here on this subreddit and nothing helps. I've tried like 10 times.

My setup:

MSI Z87-G41 PCMate

Intel 4670k @ 4.1GHz

Nvidia GTX 970

8GB RAM

Samsung 840 EVO for Windows

Kingston V300 for Hackintosh

WD 1TB for files

I can supply everything that's needed, I just need to get this thing working :D

Btw the error message that it gives me when trying to sign in to iMessage is:

"Could not sign in to iMessage.

An error occurred during activation. Try again."

Any help would be appreciated!