Hi,
You have the "send order details" option of the payment method activated.
However, PayPal calculates the total amount himself and finds a discrepency compared to the total sent by HikaShop because you configured HikaShop to calculate the prices differently.
So there are two things you can do:
- you can try changing the "round prices during calculations" setting of the HikaShop configuration. That will change the way HikaShop calculates.
- you can also turn off the send order details setting of the payment method so that HikaShop only gives the total to PayPal. In that case, there won't be a problem.