WordPress error: Could not create directory. /public_html.

If your WordPress automatic update fails with the error:

An error occured while updating WordPress: Could not create directory. /public_html.

1) Log into your server
2) Delete the folder ‘upgrade’ found in the wp-content folder
3) Remake the ‘upgrade’ folder (mkdir upgrade)
4) Change the permissions to 777 (chmod -R 777 upgrade)

Done!