Error 10426: Item total is invalid, UPS/PayPal Pro

I think I may have discovered an incompatibility between the UPS shipping plugin and the Paypal plugin. My client notified me that their customers were getting the following message "Error 10426: Item total is invalid" during the checkout process and were unable to submit their orders.

I tried out several things and located the root of the problem. When an amount is added to the "handling fees %" of the UPS configuration, this causes the error.

Is there an update to the UPS or PayPal plugin that fixes this bug? My customer is very adamant about using the "handling fees %" feature.

Thanks,

HikaShop Essential user

Nicolas,
I don't doubt that it's more related to Paypal than UPS. However, I do want to emphasize that the system works flawlessly when the "handling fees percent" field is left blank on the UPS plugin.

If I enable the debugging option of the PayPal plugin, will this affect the checkout process / customer experience in any way? How can I access the payment log file? Is this part of the Cron tab in the configuration?

Thanks,

Thanks Nicholas,
I'll try this out and let you know if I get any feedback.
I was able to output some data on the checkout screen:

• shipping_price: 16.7675 (with 5% handling fee)
• shipping_price: 16.34 (without handling fee %)

I tried replacing the code, but it had no affect.

However, I changed:
$rates[$i]->shipping_price+=$order->total->prices[0]->price_value_with_tax*($rate->shipping_params->handling_fees_percent/100);

to:
$rates[$i]->shipping_price+=round($order->total->prices[0]->price_value_with_tax*($rate->shipping_params->handling_fees_percent/100),2);

and it is now providing a figure with two decimals whenever using the "handling fees percent" option. I won't know for sure if this is the solution until I can test later on my live site.

Question. Will the UPS plugin be replaced if I ever update HikaShop or will my changes persist?

Thanks,