2 400 index.vue:399 QiniuRequestError {name: 'RequestError', message: 'xhr request failed, code: 400 response: {"error":"…field CompleteMultipart.mimeType of type string"}', stack: 'Error\n at QiniuRequestError.QiniuError (webpack…node_modules/qiniu-js/esm/utils/helper.js:248:24)', code: 400, reqId: 'Mm0AAACDvvroC2YX', …} code : 400 data : error : "json: cannot unmarshal array into Go struct field CompleteMultipart.mimeType of type string" [[Prototype]] : Object constructor : ƒ Object() hasOwnProperty : ƒ hasOwnProperty() isPrototypeOf : ƒ isPrototypeOf() propertyIsEnumerable : ƒ propertyIsEnumerable() toLocaleString : ƒ toLocaleString() toString : ƒ toString() valueOf : ƒ valueOf() __defineGetter__ : ƒ __defineGetter__() __defineSetter__ : ƒ __defineSetter__() __lookupGetter__ : ƒ __lookupGetter__() __lookupSetter__ : ƒ __lookupSetter__() __proto__ : (...) get __proto__ : ƒ __proto__() set __proto__ : ƒ __proto__() isRequestError : true message : "xhr request failed, code: 400 response: {\"error\":\"json: cannot unmarshal array into Go struct field CompleteMultipart.mimeType of type string\"}" name : "RequestError" reqId : "Mm0AAACDvvroC2YX" stack : "Error\n at QiniuRequestError.QiniuError (webpack-internal:///./node_modules/qiniu-js/esm/errors/index.js:47:22)\n at new QiniuRequestError (webpack-internal:///./node_modules/qiniu-js/esm/errors/index.js:55:28)\n at xhr.onreadystatechange (webpack-internal:///./node_modules/qiniu-js/esm/utils/helper.js:248:24)" [[Prototype]] : QiniuError constructor : ƒ QiniuRequestError(code, reqId, message, data) [[Prototype]] : Object

这是一个错误信息，看起来是上传文件至七牛云存储时出现了问题，具体错误信息是“json: cannot unmarshal array into Go struct field CompleteMultipart.mimeType of type string”。需要检查代码中的上传参数是否正确，或者联系七牛云存储的支持团队进行帮助。