Attempt to modify property "hikamarket" on null

-- HikaShop version -- : 4.7.0 Business
-- HikaMarket version -- : 4.1.1
-- Joomla version -- : 4.2.5
-- PHP version -- : 8.0.13
-- Browser(s) name and version -- : Chrome
-- Error-message(debug-mod must be tuned on) -- : Attempt to modify property "hikamarket" on null

Hello,

I am getting the error message "Attempt to modify property "Hikamarket" on null". I've initially asked this question over on the hikashop part ( www.hikashop.com/forum/shipping-methods/...ts-issue.html#347496 ) where I've also attached some screenshots to help. The issue with the shipping costs not being changed has been fixed, however the error still keeps popping up.

Hello,

In your callstack I can see that you have an override for the HikaShop order class.
Would it be possible to know what your override is doing ?

And would it be possible to have the line "1921" of the file with the error.
When I look at the source of HikaMarket 4.1.1 ; the error is not logical because just above the variable $order is read and can't be empty.

Regards,