Launcher won't log in. Invalid email/password

@SethWolfbaine You have to delete the browsing history in IE (Internet Explorer). The game uses IE to communicate. If the web site is restarted the stored cookie becomes invalid and the web site can not create a new one while a valid cookie is stored or expires. Again you have to delete browsing history in Windows Internet Explorer (IE). You do not have to clear any cache or delete any files. Clearing the cookies in Chrome will not fix this issue. If you are getting an invalid password, the password has changed because of you multiple times changing it or you still have not cleared the cookie in IE. If you have Windows 10 in the box ask me anything just type IE 11 and you will be able to open Internet Explorer and not Edge.

I have already cleared them in IE, as mentioned above

Hi, I'm having this problem too. I have an idea about what may have caused it. Yesterday i was playing my game and then my computer suddenly shut off because my cat walked on the power button.

I turned it back on, and opened up my launcher to start up my game again. The Welcome screen was blank and I couldn't sign in from the Downloads, Installed Content, or Uploads pages. I've opened the game and attempted signing in in various ways. I have store content that I want to download, but I can't because the launcher is working like it's supposed to!

I don't use IE and have tried everything suggested in other threads. Nothing works. 

@SethWolfbaine First it doesn't matter what browser YOU use, the game uses IE. Whenever you enter thesims3.com site and then enter the store you HAVE to re login. When you change your password the process is complicated as far as the EA computer system are concerned and it may time some time to complete this action. I would recommend that if changing your password word once did not fix the problem then changing it again most likely will not fix the problem. At this point it is hard to tell what data the site will acknowledge. At this point I  recommend you contact EA customer service as they can research the issue - link - EA customer service

@Aquaswan When you force shut down your computer any open file that is not closed properly could become corrupt. Many times this does not effect the computer and the computer will restart normally but... The game does not seem to be connecting across the internet. You may not use IE but the game does. First try to delete the browsing history in IE. This will delete the cookie and allow a new cookie to be created. If that does work try open Origin, right click the game icon, click repair game. Can you access the internet from that computer now (since kitty)?

Thank you for the help, It's working now. ^^

Im having this same issue however IE isn't even on my computer. Are you telling me I have to install IE to clear things that aren't even there? Makes no sense. I've done exactly what you've said on both chrome and edge those are what's on my computer. No luck

@Allana93Rose  If you have Windows 10, you have Internet Explorer in there somewhere, even if you've never used it.  So yes, please try clearing its cache.

If that doesn't help, try changing your password to something that contains only letters and numbers, no special characters, accents, etc.  The launcher seems to not like & and ! in particular, but other symbols may also be a problem.

@Allana93Rose  If you click Windows key-R, enter "appwiz.cpl" without quotes, and click "Turn Windows features on or off," is the box next to Internet Explorer checked?  I'm not suggesting you need to reinstall it if it's gone, just saying that if it's already somewhere on your computer, you'll see it here.

If you really don't have IE, and clearing everything from both your other browsers didn't help, try changing your password, as described.

If that doesn't help either, go into Documents\Electronic Arts\The Sims 3\Downloads and delete the file labeled [your email].bin, then clear the browser caches again.