I agree…how do i fix this…….
I just upgraded. I got the same error, same “wp-settings.php on line 209”
any results yet?
You failed to upload ALL of the WordPress files. Particularly those in wp-includes.
Re-upload WordPress, and make sure that every file gets uploaded correctly. You can’t miss any of them.
I actually answered my own question with some google searching.
The error stemmed from my wp-db.php file. I like some others are running on a IIS server and have that pesky problem.
I used this link here and I was able to finish the upgrade.
Hope this helps..it helped me.
If you get the “Call to undefined method wpdb::set_prefix()” than that workaround won’t help you. That workaround does something totally different.
The “Call to undefined method wpdb::set_prefix()” means that you did not upload the new wp-db.php file in the first place. Sure, uploading the modified file will fix the problem, but so would uploading the non-modified one. Plus, if you failed to update one file, you likely failed to update other files as well.
Really. Re-upload a fresh copy of WordPress. I’m not making this stuff up.