Hopefully fixed for the next release.
For some reason, the "NASTIZIA_MET" flag was set to undefined, which wipes out the path to be able to visit Nastizia's estate. I've updated the checks so that if that flag is ever undefined and you meet her first-time encounter prerequisites, Nastizia should now be re-encounterable at the bar to properly set the flag's value again.
I've also updated the encounter to where refusing Nastizia's request should now flag her as being avoided (functionally, the NPC is permanently removed). Nastizia's cheat has been revised to reset her first-time encounter if she was avoided. It should also list out any of the prerequisites needed to start her quest if the player character lacks them (genitals, virility, money, story progress, etc.).