I am missing a world key for some reason
No idea how but I’m missing one world key and can’t unlock Dark ages.
Forum Discussion
I'm having the same issue and have contacted EA about it and they said that there is nothing they can do.
They were not able to fix it because I think game keys are a part of the game code. So solving those issues will need a major rewrite of the game by making it a linear adventure mode like PvZ 1, and reprogramming your data.
Until something happens, my best advice would be to sync this account to your email, and start a new game on a different profile. I know this will be super-mega-ultra frustrating for you, but until EA fixes this issue, I can't really recommend anything.
Or else...
You could download Project Eclise (it's a modified PvZ 2 with major changes made to recreate the casual-gamer-friendly gameplay of PvZ 1 while incorporating the time travel theme). Although I haven't played it myself, I hear that many people are happy with it and compare it to the original non-pay2win, more balanced game. Don't worry, the graphics are exactly the same from PvZ 2.
Here's a link to their fandom page if you're interested.
https://project-eclise.fandom.com/wiki/Plants_vs._Zombies_2:_Project_ECLISE_Wiki
