Posts page only shows one post

As noted in a comment above, apparently the theme I use in one of its updates required the Options Framework plugin. Without it, a certain function was undefined. Thus the error and the breaking of the posts page. Installing the plugin solved the issue.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)