Upgrade from 2.0.18 fails despite numerous attempts
I'm trying to upgrade a vanilla install hosted on 123-reg from 2.0.18 to 2.2 following the instructions here:
I overwrite the files via FTP and go to visit /utility/update, yet every time I do, there is nothing but the following error:
Fatal error: Call to undefined function val() in /home/cluster-sites/1/s/sanguinehunt.co.uk/public_html/forum/library/core/class.autoloader.php on line 442
This displays on all pages of the forum. I have attempted this 4 times, each time starting afresh.
Can anybody shed light? These are desperate times.
Thanks in advance to you all.