Alipay Error Message - Illegal partner -

-- url of the page with the problem -- : www.alipay.com/cooperate/gateway.do?_inp...d21cce&sign_type=MD5
-- HikaShop version -- : 2.3.5
-- Joomla version -- : 3
-- PHP version -- : 5.3
-- Browser(s) name and version -- : firefox, chrome, ie
-- Error-message(debug-mod must be tuned on) -- : When user selects alipay payment method to make a payment they get directed to an error page:
调试错误，请回到请求来源地，重新发起请求。
错误代码 ILLEGAL_PARTNER
说明:如果您不是因为本接口集成调试而看见该错误提醒，请联系本次请求来源网站，本错误属于网站集成接口的错误。

When user selects alipay payment method to make a payment they get directed to an error page:
调试错误，请回到请求来源地，重新发起请求。
错误代码 ILLEGAL_PARTNER
说明:如果您不是因为本接口集成调试而看见该错误提醒，请联系本次请求来源网站，本错误属于网站集成接口的错误。

We'll continue through that thread : www.hikashop.com/forum/payment-methods/8...ay-error.html#192042