Ever since Friday, my login in-game - not in the launcher, not on the website - seems to keep failing for incorrect information, over and over. I changed the password once, just to try and make it work, and it did... temporarily, but now it's back to mostly rejecting the correct passowrd.

It's mostly annoying because when not logged in, the notification panel collapses in game, and with all the ones coming in from interactions and mods, I like keeping it open.

Anyone else having the same issues?

Many players are and the fault is on EA's end. This would be the thread on the offcial AHQ board to follow.
https://answers.ea.com/t5/The-Sims-3/Si ... 66#M232774