回调不是selectize中的函数错误

我正在做一个yii2基础项目,我在表单中使用了selectize扩展。 当我运行这部分时,它返回一个错误:回调不是函数

report\u cp是一个下拉字段,选择一个值后,它将启用第二个字段,并将url+所选值的函数设置为report\cs。负载

这里是JSFIDLE链接 https://jsfiddle.net/6uhLts2w/5/ 使用测试json服务器替换URL

    var report_cp; // all these are dropdown inputs
    var report_cs; // at start disabled, will enable after report_cp value selected
    var report_cnt; // at start disabled, will enable after report_cs value selected

    report_cp = $('#reports-cp').selectize({
        onChange: function(value) {
            if (!value.length) return;

            report_cs.enable();

            report_cs.load(function (query, callback) {
                if (!query.length) return callback();
                $.getJSON('../search/sections?id=' + value, { query: encodeURIComponent(query) }, function (data) { callback(data); })//error is right here
                .fail(function () { callback(); });
            });
        },
        load:function (query, callback) { //retrieve select options from database
                if (!query.length) return callback();
                $.getJSON('../search/companies', { query: encodeURIComponent(query) }, function (data) { callback(data); })
                .fail(function () { callback(); });
        },
        valueField: 'id',
        labelField: 'name',
        searchField: ['name'],
        persist: false,
        createOnBlur: true,
        maxItems: 1,
        create: true
    });

    report_cs = $('#reports-cs').selectize({
        onChange: function(value) {
            if (!value.length) return;

            report_cs.load(function (query, callback) {
                if (!query.length) return callback();
                $.getJSON('../search/contacts?id=' + value, { query: encodeURIComponent(query) }, function (data) { callback(data); report_cs.enable(); })
                .fail(function () { callback(); });
            });
        },
        valueField: 'id',
        labelField: 'name',
        searchField: ['name'],
        persist: false,
        createOnBlur: false,
        maxItems: 1,
        create: false
    });
    //report_cnt same as report_cs goes here...