I'm unable to reprint orders from list. When I click on print in front of each order it shows this error.

Link to screenshot: https://drive.google.com/open?id=1e0K8zmP66nViBntzb4DB3E48cBZEh2eA

Please help not much familiar with java code. 
addons/reprint/static/js/print.js is as below .

odoo.define('order_reprinting_pos',function(require) {
"use strict";

var gui = require('point_of_sale.gui');
var chrome = require('point_of_sale.chrome');
var popups = require('point_of_sale.popups');
var core = require('web.core');
var models = require('point_of_sale.models');
var PosModelSuper = models.PosModel;
var pos_screens = require('point_of_sale.screens');
var Model = require('web.DataModel');
var QWeb = core.qweb;
var _t = core._t;

models.load_models({
model: 'pos.order',
fields: ['id', 'name', 'session_id', 'pos_reference', 'partner_id', 'amount_total', 'amount_tax'],
loaded: function (self, pos_orders) {
var new_order_list = [];
for (var i in pos_orders){
new_order_list[pos_orders[i].id] = pos_orders[i];
}
self.pos_orders = new_order_list;
},
});

var DomCache = core.Class.extend({
init: function(options){
options = options || {};
this.max_size = options.max_size || 2000;

this.cache = {};
this.access_time = {};
this.size = 0;
},
cache_node: function(key,node){
var cached = this.cache[key];
this.cache[key] = node;
this.access_time[key] = new Date().getTime();
if(!cached){
this.size++;
while(this.size >= this.max_size){
var oldest_key = null;
var oldest_time = new Date().getTime();
for(key in this.cache){
var time = this.access_time[key];
if(time <= oldest_time){
oldest_time = time;
oldest_key = key;
}
}
if(oldest_key){
delete this.cache[oldest_key];
delete this.access_time[oldest_key];
}
this.size--;
}
}
return node;
},
clear_node: function(key) {
var cached = this.cache[key];
if (cached) {
delete this.cache[key];
delete this.access_time[key];
this.size --;
}
},
get_node: function(key){
var cached = this.cache[key];
if(cached){
this.access_time[key] = new Date().getTime();
}
return cached;
},
});
chrome.OrderSelectorWidget.include({
renderElement: function(){
var self = this;
this._super();
this.$('.orders-list').click(function(event){
self.gui.show_screen('OldOrdersWidget');
});
},
});

models.PosModel = models.PosModel.extend({
_save_to_server: function (orders, options) {
var result_new = PosModelSuper.prototype._save_to_server.call(this, orders, options);
var self = this;
var new_order = {};
var order_list = self.pos_orders;
for (var i in orders) {
var partners = self.partners;
var partner = "";
for(var j in partners){
if(partners[j].id == orders[i].data.partner_id){
partner = partners[j].name;
}
}
new_order = {
'amount_tax': orders[i].data.amount_tax,
'amount_total': orders[i].data.amount_total,
'pos_reference': orders[i].data.name,
'partner_id': [orders[i].data.partner_id, partner],
'session_id': [
self.pos_session.id, self.pos_session.name
]
};
order_list.push(new_order);
self.pos_orders = order_list;
self.gui.screen_instances.OldOrdersWidget.render_list(order_list);
}
return result_new;
},
});

var OldOrdersWidget = pos_screens.ScreenWidget.extend({
template: 'OldOrdersWidget',

init: function(parent, options){
this._super(parent, options);
this.order_cache = new DomCache();
this.order_string = "";
this.pos_reference = "";
},

auto_back: true,
renderElement: function () {
this._super(this);
var self = this;
this.$('.button.print').click(function(){
if (!self._locked) {
self.gui.screen_instances.receipt.print();
}
new Model('pos.order').call('get_details',[self.pos_reference]).then(function(id){
self.chrome.do_action('order_reprinting_pos.pos_receipt_report',{additional_context:{
active_ids:[id],
}});
});
});
},

show: function(){
var self = this;
this._super();

this.renderElement();
this.details_visible = false;

this.$('.back').click(function(){
self.gui.back();
});
var pos_orders = this.pos.pos_orders;
this.render_list(pos_orders);


var search_timeout = null;

if(this.pos.config.iface_vkeyboard && this.chrome.widget.keyboard){
this.chrome.widget.keyboard.connect(this.$('.searchbox input'));
}

this.$('.searchbox input').on('keypress',function(event){
clearTimeout(search_timeout);

var query = this.value;
search_timeout = setTimeout(function(){
self.perform_search(query,event.which === 13);
},70);
});

this.$('.searchbox .search-clear').click(function(){
self.clear_search();
});
},
hide: function () {
this._super();
this.new_client = null;
},
perform_search: function(query, associate_result){
var new_orders;
if(query){
new_orders = this.search_order(query);

this.render_list(new_orders);
}else{
var orders = this.pos.pos_orders;
this.render_list(orders);
}
},
search_order: function(query){
var self = this;
try {
query = query.replace(/[\[\]\(\)\+\*\?\.\-\!\&\^\$\|\~\_\{\}\:\,\\\/]/g,'.');
query = query.replace(' ','.+');
var re = RegExp("([0-9]+):.*?"+query,"gi");
}catch(e){
return [];
}
var results = [];
for(var i = 0; i < Math.min(self.pos.pos_orders.length,1000); i++){
var r = re.exec(this.order_string);
if(r){
var id = Number(r[1]);
results.push(this.get_order_by_id(id));
}else{
break;
}
}
return results;
},
// returns the order with the id provided
get_order_by_id: function (id) {
return this.pos.pos_orders[id];
},
clear_search: function(){
var orders = this.pos.pos_orders;
this.render_list(orders);
this.$('.searchbox input')[0].value = '';
this.$('.searchbox input').focus();
},
render_list: function(orders){
var self = this;
for(var i = 0, len = Math.min(orders.length,1000); i < len; i++) {
if (orders[i]) {
var order = orders[i];
self.order_string += i + ':' + order.pos_reference + '\n';
}
}

this.$('.order-list-contents').delegate('.print-button','click',function(event){
var pos_ref = $(this).data('id');
var order_new = null;
for(var i = 0, len = Math.min(orders.length,1000); i < len; i++) {
if (orders[i] && orders[i].pos_reference == pos_ref) {
order_new = orders[i];
}
}
$('span.searchbox').css('display', 'none');
$('.button.print').css('display', 'block');
var lines = [];
var payments = [];
var discount = 0;
new Model('pos.order').call('get_orderlines',[order_new.pos_reference]).then(function(result){
lines = result[0];
payments = result[2];
discount = result[1];
self.gui.show_screen('OldOrdersWidget');
self.$('.window').html(QWeb.render('PosTicketOld',{
widget:self,
order: order_new,
change: result[3],
orderlines: lines,
discount_total: discount,
paymentlines: payments,
}));
self.pos_reference = order_new.pos_reference;
});
});

var contents = this.$el[0].querySelector('.order-list-contents');
if (contents){
contents.innerHTML = "";
for(var i = 0, len = Math.min(orders.length,1000); i < len; i++) {
if (orders[i]) {
var order = orders[i];

var orderline = this.order_cache.get_node(order.id);
if (!orderline) {
var clientline_html = QWeb.render('OrderLine', {widget: this, order: order});
var orderline = document.createElement('tbody');
orderline.innerHTML = clientline_html;
orderline = orderline.childNodes[1];
if (order.id){
this.order_cache.cache_node(order.id, orderline);
}
else{
this.order_cache.cache_node(i, orderline);
}
}
contents.appendChild(orderline);
}
}
}
},

close: function(){
this._super();
},
});
gui.define_screen({name:'OldOrdersWidget', widget: OldOrdersWidget});

});
​