Coupon Free Product Plugin Causes Checkout Error

-- url of the page with the problem -- : hatsukoi.co.uk/freetest/
-- HikaShop version -- : 5.1.0
-- Joomla version -- : 5.1.2
-- PHP version -- : 8.2

Hi there

I just purchased the Coupon Free Product plugin to add a free item with a coupon code.

It all seemed to work OK until I noticed that if you come out of the checkout and then try to go back using the basket link, it causes a fatal error.

I am working this test site:
hatsukoi.co.uk/freetest/

You can add any items to the basket and then use the code FREE at the checkout to load the free product. However, if you click on the mini basket module, for example if you look at another product, you then get the red fatal error screen (attached).

I don't have an override for that module so I wonder if there is something else causing the error... The only thing I can think of that might be strange about the free product is that its category is outside of 'product category' and is directly under 'root'.

I'd be grateful if you could let me know if you think I'm doing something wrong at this end?

Many thanks
Leila

Hi Philip

That fixed it! I updated the GA4 plugin and it all works well now. Many thanks for your help with that, I really appreciate it.

Best wishes
Leila