Starting last week I began to see a message that my launcher wouldn't initialize. The cc would install so I ignored it. Today after I installed Ambitions, I was having CTD when entering a lot. I was attempting to play a vanilla game as I had pulled all of my mods and cc. I decided to uninstall Ambitions
This was on old AM issue which has been addressed. Were you using AM at the time?
I'm not sure what possessed me, but I uninstalled the rest of my Sims 3 games. I reinstalled/installed the base game three times. After each time I've installed the game, I would attempt to start up a vanilla game and receive the above message. It will not start. I've tried to install Riverview from the store and still get the same message. The forums (for what they are worth) are down for maintenance. I have tried using the TS3.exe to start the base game and still get the same message.
I wouldn't be surprised if EA took their forums offline because of all the issues that are no doubt being raised.
If your on a PC, the problem could be with the EADM. If the EADM isn't installed right, or working right, the launcher won't work right either. Sometimes when updating the EADM update fails, which in turn screws everything else. A quick google search and you should be able to download a copy of the EADM to install manually. If your on a MAC, then I don't know what else to suggest.