Slicing failed. Problem during slicing (255)

So…no matter what I do I seem to be getting this error when I try to slice a model. What is more frustrating is that it doesn’t explain WHY it failed. Can someone clarify what is going on? Wont pay for a service that doesn’t work.

I can’t tell you what is wrong but you don’t have to pay for this?
Have you changed anything in the start/end g-code that gave me a lot of errors

@Dominic_Lodovichetti, like @Labo said, it’s most likely a problem in your start/end gcode. Did you change anything there? Is it one of the built-in printers?