So I just activated WordPress SEO, and now every post on my site is 404’ing :( WTF would cause that? http://t.co/476HCExQAT

So I just activated WordPress SEO, and now every post on my site is 404’ing 🙁 WTF would cause that? http://t.co/476HCExQAT … http://ift.tt/1zfLmEC