Re: Sims 3 Seasons Missing Content

No, I have no mods.

I have some custom content from thesimsresource, clothing and such, but I ran the game without it and had no results.

try this move your CC folder to the desktop for now and try the factory reset  also back up your stuff first , hopefully it could be something as simple as  a CC item/s causing the issue or a corrupt data user file

http://sims3.crinrict.com/en/2011/03/faq-what-files-should-i-backup.html

http://sims3.crinrict.com/en/2011/06/tutorial-resetting-the-game-to-factory-settings-without-reinstalling.html

Unfortunately I followed all the steps and the problem is still present.

awwww pity it had to come to that but glad you have it sorted