Hi,
There is an option in the payment methods, the option is called "debug".
This option is to put the plugin in the "test mode", to use a "test account" in order to "test" the plugin.
It also have the feature to display some debugging information.
It is no more complicated than that.
So, if your account is not a test account, it is fully logical that the plugin in "debug" mode does not work and it will never work until you removed this option in the payment configuration.
Is that clear enough ?
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.