Hi,
The error comes from the vendorpoints plugin of HikaMarket, not HikaShop.
I can see your subscription to HikaMarket expired in February 2021, but HikaMarket 4.0.0, with the support of Joomla 4, was only released in March 2021 (
www.hikashop.com/support/documentation/1...arket-changelog.html
).
So this means you need to update your HikaMarket and it should fix the problem automatically.
Now, if you don't want to use HikaMarket anymore, you can disable that vendorpoints plugin via the Joomla plugins manager and this error won't happen anymore.