This is a global mod, it is installed separately, go to the big mods section and find the Hot Coffee mod, everything is written in detail there, including how to install :)
This also happens to me, the author of the mod himself wrote that when crashing, clear the CINFO.BIN file along the path Android/data/com.rockstargames.gtasa/files (and sometimes clear the cache, maybe that will help too). I have already completed this mission.
I just haven't encountered this problem before