Route 66 error after Joomla & template update

 Hello,
I have updated Joomla to latest version (3.10.5) and also updated all components / plugins to latest version including my template (I'm using Shaper helix ultimate 2.0.5).
Since the update, when I try to go to an item page (K2) I get an error page.

link to category page (with links to poducts): http://www.melgol.taktiko.co.uk/%D7%AA%D7%97%D7%95%D7%9E%D7%99-%D7%A4%D7%A2%D7%99%D7%9C%D7%95%D7%AA/%D7%90%D7%99%D7%98%D7%95%D7%9D/%D7%99%D7%A8%D7%99%D7%A2%D7%95%D7%AA-pre-applied

link to k2 item page: http://www.melgol.taktiko.co.uk/2338 (debug mode on)

Thank you

Hi
Thank you for your reply.
I have been using Route 66 and it was working fine and i did define URL patterns.
However, your answer helped me understand that the problem might be with the Helix Ultimate template as it is managing menu items as well and that might cause the issue.
I'll contact them for support.
Thank you