first post on here so go easy :) got a problem with a wordpress site (custom theme) http://expressduplication.co.uk which was built a few years ago by a company we are no longer able to get in touch with.
It was running an old version of wordpress 2.x.x (can't remember the exact version) and I have today updated to version 4.5.2.
Now whenever I click one of the links in the sub menu in the nav bar eg. Products > Special Offers, I receive a page cannot be found error and in the URL it is showing:
When it is supposed to be expressduplication.co.uk/special-offers
This works fine when inputted manually, just not through the links.
I notice "SITE_HOME_URL" getting inserted into links all over the site therefore breaking them, "THEME_PATH" is also getting inserted into links for some images therefore breaking them too. It seems like some request isn't being answered as it was in the old version of wordpress.
I have average experience and skills with Wordpress but this one has me beat.
Thanks for the help in advance :)