I recently upgraded from J3.x to J4.4. I'm using PHP 8.2

I've noticed an issue, I have a menu item type Login Form. When I access the page I see a 5005 error, when I set error reporting to maximum I see:

Attempted to load class "Helper" from namespace "HelixUltimate\Framework\Platform". Did you forget a "use" statement for another namespace?

I am using: shaper_helixultimateHelix 2.1.2 System - Helix Ultimate Framework 2.1.2

When I switch to using the efault Cassiopeia it works fine.

Any ideas?