The second problem is solved too, and I have successfully placed a test order in your store:
Please see the following instructions for testing:
Also you need to report proper «Postback URL» and «Customer Return URL» to Dragonpay’s support (you can see these URL’s in the module’s backend settings).
By the way, I see that you plan to use iPay88 too, and I have a module for it too: mage2.pro/c/extensions/ipay88.
It is better than the official module because in some way: particularly, it shows the available payment optioms on the Magento side:
