High Sierra wont boot every so often

Hi,

I recently got my hackintosh working around a month of so ago, and I've been having this problem ever since. Every so often when I boot up my hackintosh, it gives me the message below and just stops, no more progression.

I do not get this message every time I boot, I can do a hard-restart and the message isn't shown and it boots and runs flawlessly.

"does printf work??"

https://i.imgur.com/nCgWqrx.jpg (Ignore that horrible light bleed)