Another bug... Andrew bj scene in the club bathroom has no images :/ Can't find it in the game files either. Why did they release such an unfinished version??
Did you skip past the current Day 5.5 end-of-content? If you removed the 'to be continued' at Day 5.5, then anything past that is "beta" and not officially released yet. The game includes code all the way up to Day 7, but I wouldn't consider it reliable or finished.
I looked at all the RPY files currently packaged in the RPA, and the only place Andrew shows up is on Day 6. That's beyond the supported days, so I'm not surprised it's not working fully yet. The only time Andrew might be mentioned in the current content is on the modeling path, when Richard might mention, depending on conversation choices, that he has a son named Andrew.