I can't see that convo without an account. Have you asked for help there?
Until I get home I can't really look at that apx. Maybe install TWRP and the ROM from post #4 or a TWRP backup? Without knowing what that apx flashed its hard to say. The ROM from highwaystar_ru (mostly) works. Might at least get you out of the bootloop.
And just to be clear, you did not flash that 15.1 build, right? What were you running before flashing the apx?
Unless TWRP and that LOS 14.1 ROM or a TWRP backup help we've gone off topic for this thread...
I have not attempted to run a custom rom yet. I did boot twrp but I didn't install/flash it