Page/Post Update: FOLDER ERROR

Whenever I try to update any post or page, I’m redirected to a page that says “FOLDER ERROR”. The address is “wp-admin/page.php” or “wp-admin/post.php”, depending on what I try to update. The data in the post/page updates, but the redirect back to the edit page seems to fail.

I just moved all of my WordPress files to a new directory on the same server. I had some issues with the uploaded image files, so I downloaded the SQL database, did a find-and-replace, and reimported, which solved the problem. I haven’t had any other issues besides this.

Any ideas?

Thanks in advance.