Not sure what happened.
Imported a relatively large WordPress site in comparison to those I’ve imported before (though this might not have anything to do with the problem).
Selected the import authors to publii option, waited for the upload to finish, now I can see the posts when I hit preview, but when I go to the posts page, it’s blank, same with the author page. I can create a new post, but when it’s created I can see it in preview, but not in the backend.