error create order API: 422

[Sơn]

I am creating an order using the API, but the response I received is:{
"errors": {
"base": [
"Internal error"
]
}
} 

with a 422 Unprocessable Content error. This payload 

"order": {

"name": "2501150117",

"customer": {

"first_name": "服部テスト",

"last_name": "服部テスト",

"phone": "+819011112222",

"email": "",

"addresses": [

{

"first_name": "服部テスト",

"last_name": "服部テスト",

"country": "Japan",

"address1": "テスト町９−９−９",

"address2": "テスト町９−９−９",

"zip": 17203,

"phone": "+819011112222"

}

]

},

"line_items": [

{

"variant_id": 49567955747112,

"quantity": 1

}

],

"shipping_address": {

"first_name": "服部テスト",

"last_name": "服部テスト",

"country": "Japan",

"address1": "テスト町９−９−９",

"address2": "テスト町９−９−９",

"zip": 17203,

"phone": "+819011112222"

}

}

The request was well-formed but had semantic errors. I don't know what is wrong with my payload. I need help. Thank you!