支付宝小程序报40004 受理商户号不能为空, 咋弄?

20-Sep-2019 14:55:47.166 SEVERE [http-nio-8090-exec-10] sdk.biz.err.logErrorScene ErrorScene^^40004^^ACQ.SECONDARY_MERCHANT_ID_BLANK^^null^^Windows 8.1^^2019-09-20 14:55:47^^ProtocalMustParams:sign=UM5Y5qXskC02XJ1NphwBKLLJZG5KSego59gIGZqLgzK/ZjNhdc0QU3w1jys2Fgt8vxvANeh5j37g9YpXRsnKXSqVjPhR68FRY2BuZONKvJmcEk5gFqFmeS9NQdO6Y/Km3SOj3/0A+H5iO6JP9nQbiPXuKGczHoY8ZnkcWUMMemFC3PbX4DmfsVLLMyFmW2oiDHM7ag68qz2ssv/5S5S7bZ/XK5yNIi0kWs63+CMa4B2HjQ1UkB5K+KYxKypqxa4FqydY8I2nkmfC+/mNuwJxluWKkOJYMtap/Z6JABYaDH80gsy695kS199VzE8LICjO7My3o87ScDE/3I2lEzNeNA==&timestamp=2019-09-20 14:55:47&sign_type=RSA2&charset=UTF-8&app_id=2019091867557376&method=alipay.trade.create&version=1.0^^ProtocalOptParams:alipay_sdk=alipay-sdk-java-dynamicVersionNo&format=json^^ApplicationParams:biz_content={"out_trade_no":"15689625470832088712163917638","total_amount":0.01,"scene":"bar_code","subject":"test","buyer_id":"2088712163917638"}^_^Body:{"alipay_trade_create_response":{"code":"40004","msg":"Business Failed","sub_code":"ACQ.SECONDARY_MERCHANT_ID_BLANK","sub_msg":"受理商户号不能为空"},"sign":"KccTwNfKJrp31LjHwKdrUAFGMh1/kDGAggA6XeLTUWqrabT738Co3onvjhDR3QtE9t/FQvnORBBzrMZ9JGcGzsi6dWQHxQw+0T3YBJRtQ0/3FgcFOpcF4plKJKXz2QKzQZj52npPZ1djSAXPEmOn1BNmVQX7UcajPhbWPvb/NmGhwlpHzIP3le29cMAqgkyNW6gFReI3o//x1Ys6FF1rg9ULGOd9B0kloatBGepT0eF5idTIZA/epHeXP+HZyjLiEkzNWRcaefURxS91iOyOOdWj06ip+/bynEGYWjNgWozf4dgemMxgOO6d7XgOvz9jzyYKRJKIF71ao4vtQT1lpA=="}