Never have i had an issue like this before, i am comfortable coding and i have searched and searched for this issue...
My problem:
When searching from the main search bar at the top of the page it is going to this link "https://www.hpprintandgraphics.co.uk/undefinedindex.php?route=product/search&filter_name=mug"
Notice the undefined before index?
Now i have searched for 2 days for a solution and cannot find one, if you delete the "undefined" ofcourse it works.
Any ideas?
PS THIS WAS WORKING PREVIOUS AND THERE HAS BEEN NO CHANGES AT ALL, THEN SUDDENLY IT STOPPED WORKING
