Made my own Windows 10 ISO with an autoanswer file but it won't boot

[DawnTreader]

So just as the title says, I built an ISO with an autoanswer file. But it won't boot in the ventoy USB. So I made it into its own USB with Rufus and it boots and does what I need it to. Why won't it work on the Ventoy USB?

I was thinking that maybe it is some kind of checksum thing that Ventoy might do or maybe the fact that I used WinISO to do the adding of the autoanswer file.

Any and all help appreciated.