node-ews: RangeError: Maximum call stack size exceeded

I’m running EWS function “UpdateItem” with arguments:

{
    attributes: {
        MessageDisposition: 'SaveOnly',
        ConflictResolution: 'AutoResolve'
    },
    ItemChanges: [{
        ItemChange: {
            ItemId: {
                attributes: {
                    Id: 'ATAUAGxsaW5kaGFyZHRAY2Jja2Mub3JnAEYAAAAAAI4eNWlSRatInnhuyOcnSIcHAPfFMAPpnn1HvotUdVcL/eIAAACqgs0AAImAA2RsA2BBpnhjzIcvvcEAANKuJAUAAA==',
                    ChangeKey: 'EwNAABYAAACJgANkbANgQaZ4Y8yHL73BAAFT2pmM'
                }
            },
            Updates: {
                SetItemField: {
                    FieldURI: {
                        attributes: {
                            FieldURI: "item:Categories"
                        },
                        Task: {
                            Categories: {
                                'String': ['Urgent!', 'Important!']
                            }
                        }
                    }
                }
            }
        }
    }]
}

and I’m getting:

C:\leankit-exchanger\node_modules\soap\lib\wsdl.js:1838 WSDL.prototype.findChildSchemaObject = function(parameterTypeObj, childName) { ^

RangeError: Maximum call stack size exceeded at WSDL.findChildSchemaObject (C:\leankit-exchanger\node_modules\soap\lib\wsdl.js:1838:48) at WSDL.findChildSchemaObject (C:\leankit-exchanger\node_modules\soap\lib\wsdl.js:1887:20) at WSDL.findChildSchemaObject (C:\leankit-exchanger\node_modules\soap\lib\wsdl.js:1887:20) at WSDL.findChildSchemaObject (C:\leankit-exchanger\node_modules\soap\lib\wsdl.js:1887:20) at WSDL.findChildSchemaObject (C:\leankit-exchanger\node_modules\soap\lib\wsdl.js:1881:19) at WSDL.findChildSchemaObject (C:\leankit-exchanger\node_modules\soap\lib\wsdl.js:1887:20) at WSDL.findChildSchemaObject (C:\leankit-exchanger\node_modules\soap\lib\wsdl.js:1887:20) at WSDL.findChildSchemaObject (C:\leankit-exchanger\node_modules\soap\lib\wsdl.js:1881:19) at WSDL.findChildSchemaObject (C:\leankit-exchanger\node_modules\soap\lib\wsdl.js:1887:20) at WSDL.findChildSchemaObject (C:\leankit-exchanger\node_modules\soap\lib\wsdl.js:1887:20)