Did you disable phone call notifications by any chance? That was a new addition in the last game patch - I tested with that enabled a little bit, but only went to the first call asking to confirm the interview time and not all the way to the interview itself. I'm traveling right now and am unable to test. As of this moment, the only issues with the interview that I know of are being on vacation and working during the interview period - you can try reapplying, just make sure phone calls are enabled, and make sure your sim is on their home lot and doesn't have work.
Also, if your sim has trait_isAlienPollinator they can't join the Alien Infiltrator career. I have both trait_isAlienPollinator and Pollination Technician 4's special NPC trait blacklisted to stop Pollination Technicians from being able to apply to the Infiltrator career (that's what the "SimName gives the missions, she/he doesn't take them!" tooltip is about). EA never meant for a sim with that trait to be playable, there's all sorts of checks against that trait in-game and it causes weird, weird bugs. Edit: after doublechecking my coding, it looks like I've blocked Pollination Technicians both from applying and from taking missions, so this is not supported.
Unfortunately Itch.io's spam filter is eating your new posts, and with the way that works I'm not getting any notifications for them. They're hidden away five clicks deep in a weird submenu. I did see your other questions: your human sim's alien partner shouldn't touch her memories unless the alien sim is evil or paranoid or they have a toxic relationship, you can be an alien hybrid and in the Pollination Technician career that's fine (so long as your sim is YA or older), and Skill Haven should be compatible unless it just doesn't work with 15 level skills. It uses the Skill_All tag to identify skills, which Alien Lore already has.
