ApolloClient GraphQL错误：行1:23字符'_'上没有可行的替代方法

Question

我正在尝试在node.js中使用ApolloClient运行查询，并且收到以下错误：

Error: GraphQL error: line 1:23 no viable alternative at character '_'
      at new ApolloError (node_modules/src/errors/ApolloError.ts:56:5)
      at node_modules/src/core/QueryManager.ts:515:31
      at node_modules/src/core/QueryManager.ts:1036:11
          at Array.forEach (<anonymous>)
      at node_modules/src/core/QueryManager.ts:1035:10
          at Map.forEach (<anonymous>)
      at QueryManager.broadcastQueries (node_modules/src/core/QueryManager.ts:1029:18)
      at Object.next (node_modules/src/core/QueryManager.ts:1130:18)
      at notifySubscription (node_modules/zen-observable/lib/Observable.js:130:18)
      at onNotify (node_modules/zen-observable/lib/Observable.js:165:3)
      at SubscriptionObserver.next (node_modules/zen-observable/lib/Observable.js:219:7)
      at node_modules/apollo-link-dedup/src/dedupLink.ts:60:47
          at Array.forEach (<anonymous>)
      at Object.next (node_modules/apollo-link-dedup/src/dedupLink.ts:60:31)
      at notifySubscription (node_modules/zen-observable/lib/Observable.js:130:18)
      at onNotify (node_modules/zen-observable/lib/Observable.js:165:3)
      at SubscriptionObserver.next (node_modules/zen-observable/lib/Observable.js:219:7)
      at Object.next (node_modules/apollo-link-error/src/index.ts:60:22)
      at notifySubscription (node_modules/zen-observable/lib/Observable.js:130:18)
      at onNotify (node_modules/zen-observable/lib/Observable.js:165:3)
      at SubscriptionObserver.next (node_modules/zen-observable/lib/Observable.js:219:7)
      at node_modules/apollo-link-http/src/httpLink.ts:142:20

这是代码段：

require('cross-fetch/polyfill');
const ApolloBoost = require('apollo-boost');
const ApolloClient = ApolloBoost.default;
const gql = require('graphql-tag');
const {
    url,
} = require('./utils');

const events = await client.query({
    query: gql`
        query EventsByTimeFrame(
            $customerId: String!
            $filters: [Field]!
        ) {
            events(customerId: $customerId, filters: $filters) {
                entityId
                values
            }
        }
    `,
    variables: {
        customerId,
        filters: {
            key: 'key',
            value: 'waste',
        },
    },
});

当我尝试通过GraphiQL运行相同的查询时，它运行良好。任何想法为什么会发生这种情况？