@Paul,
You answer is not acceptable. By doing what you are requesting i am by-passing the Joomla core function. This is a bug with Joomshaper and must be fixed.
I reinstalled the previous version of my site and this time there was a new update to version 2.0.17 was available. So i updated. Follow the steps below and see what resulted (for you information i did your 2 step advice too) :
(1) Initial Extension Update Page
https://prnt.sc/eyFMx9VXH14A
(2) After Updating System - Helix Ultimate Framework Extension
https://prnt.sc/fUJbgsrmCiRr
(3) After Updating shaper_helixultimate extension
https://prnt.sc/TKONc9T_25Vn
(4) Select a SPPB Page to Preview
https://prnt.sc/BFu1dmQ_Ylgh
(5) Preview of Page Displays Rubbish
https://prnt.sc/AGhk2w-9-zmc