I'm having the exact same trouble. It's terribly hard to get an adventure, and even when I get them they're only minor ones, or the ones my sim already completed. I've sent my sim 3 times to France already waiting for the Nectary Cellar (or whatever it's called in english hehe) oportunity to show up with no success. China works perfectly, and I haven't sent him to Egypt yet but I hope it works fine. Sleeping a night will sometimes help in France but it seems a little random to me. My game and all 3 expansion packs are original, properly purchased, installed, registered and fully patched up. I had never had this bug before Late Night (it actually started yesterday), but I guess that might have been just luck. I have no mods, just some CC... but everyone seems to be having the bug, with or without CC, so I doubt that's the source of it.
Is there a specific time of the day when the board sort of 'resets' itself and new opportunities show up? if so, maybe we could just wait until then to check for new adventures. Or maybe just go to Edit Town and build new base camp with a new opportunity board... that fixed my consignment store at least.