react-native – 域错误 – _constructor必须是’function’类型

我的代码.

import Realm from 'realm';

export const ConfigSchema = {
    name: 'Config',primaryKey: 'key',properties: {
        key: 'string',value: 'string'
    }
};

export const databaSEOptions = {
    path: 'myappreactnative.realm',schema: [ConfigSchema],schemaVersion: 0
};

export const insertNewConfig = (newConfig) => new Promise((resolve,reject) => {
    Realm.open(databaSEOptions).then(realm => {
        // realm.create('Config',newConfig);
        // resolve(newConfig);
        console.log(realm);
    }).catch((error) => reject(error))
});

我从这里调用insertNewConfig,

let config = {
    key: 'instanceUrl',value: 'myurl.domain.value'
};

insertNewConfig(config).then((result) => {
    console.log(result);
}).catch((error) => {
    console.log(error);
});

this.props.navigation.navigate('Login',{});

错误出现在Realm.open(databaSEOptions)行.首先我虽然错误是在realm.create但后来实现了原始行.

显示的错误是这样的.

Error: _constructor must be of type 'function',got (undefined)
    at sendRequest (rpc.js:263)
    at Object.createRealm (rpc.js:62)
    at new Realm (index.js:102)
    at Function.open (extensions.js:110)
    at eval (eval at <anonymous> (MetroClient.js:63),<anonymous>:29:22)
    at tryCallTwo (core.js:45)
    at doResolve (core.js:200)
    at new Promise (core.js:66)
    at insertNewConfig (eval at <anonymous> (MetroClient.js:63),<anonymous>:28:12)
    at Object.SelectInstanceScreen._this.continueLogin [as onPress] (eval at <anonymous> (MetroClient.js:63),<anonymous>:74:37)

似乎open()函数必须作为函数调用(_constructor必须是’function’类型),但很明显open()作为函数调用.
提前致谢.