HikaShop MIGS VPC payment plugin

-- HikaShop version -- : 3.0.1
-- Joomla version -- : 3.8.1
-- PHP version -- : 5.5.38
-- Browser(s) name and version -- : firefox
-- Error-message(debug-mod must be tuned on) -- : HTTP Status - 400

Hello sir,
I'm setting up the plugin: HikaShop MIGS VPC payment plugin is sampling this error.
But it still confirms the order. I would like to know how to pass this error. For, he should re-direct the customer to the page of the bank where the customer must show his credentials and finish his purchase.

Greetings, good work, thank you for helping me.

Hello sir,
I hope you're well.
This is how I am using this payment method to use VISA and MASTERCARD.
I registered here at Millenium Bim and they gave me the id of the merchant that I set here on the platform.

image removed by a moderator

Hello sir,
I have already managed to configure this plaguin and already redirects for payment.
The problem I am now facing is that it does not redirect to a return url.
And in case of transaction failure also does not redirect to the website.
The url I put here is dhomem.com to do the test.

thank you.