Hello,
Okey I understand the misunderstood, I will explain me better.
"Before contacting I did a test with the "Hikashop Microdata on Product Page plugin" enabled end the GSD plugin disabled, You can see there are even more errors..."
Yes, because this plugin (Hikashop Microdata on Product Page plugin) is out of date, when I speak about the HikaShop MicroData, I mean the core microdata system built in HikaShop view works as expected (with some warnings), see my screenshot :
Note : I disabled
all Micro Data plugins on your website
AND the old HikaShop Micro Data plugin to have this result.
Regards