@Maccraft123 I also have a S4 mini, I will test if it works.
Did you tried heimdall manually or through pmbootstrap flasher flash_kernel?
I think I never used the recovery zip since the display is broken on my S4 mini, so I cannot start the sideload.
@andrescorralmartinez: you wrote, that you are on Windows. Heimdall has reverse
engineered the protocol of the proprietary Odin flasher. If you would like, you
could try Odin on Windows and report whether it works there (pmbootstrap export --odin).
Other than that, someone who has this issue could also try the recovery zip,
and post the log if it does not work (depending on the error message it might
be that it can be fixed with !1673 (merged)).