Javascript error during cart check out

It is actually related to the theme

Did you see my screenshot of the twenty fifteen transaction that went through? Please look above in the private section again

Here is my woo commerce system status report. do I need to upgrade anything?

### WordPress Environment ###

Home URL: https://ecoraiderusa.com
Site URL: https://ecoraiderusa.com
WC Version: 2.6.4
Log Directory Writable: ✔
WP Version: 4.6.1
WP Multisite: –
WP Memory Limit: 512 MB
WP Debug Mode: –
WP Cron: ✔
Language: en_US

### Server Environment ###

Server Info: Apache
PHP Version: ❌ 5.5.9-1ubuntu4.19 - We recommend a minimum PHP version of 5.6. See: How to update your PHP version
PHP Post Max Size: 100 MB
PHP Time Limit: 3600
PHP Max Input Vars: 1000
cURL Version: 7.35.0
OpenSSL/1.0.1f

SUHOSIN Installed: –
MySQL Version: 5.6.32
Max Upload Size: 50 MB
Default Timezone is UTC: ✔
fsockopen/cURL: ✔
SoapClient: ✔
DOMDocument: ✔
GZip: ✔
Multibyte String: ✔
Remote Post: ✔
Remote Get: ✔
WCS_DEBUG: ✔ No
Subscriptions Mode: ✔ Live

### Database ###

WC Database Version: 2.6.4
: 
woocommerce_sessions: ✔
woocommerce_api_keys: ✔
woocommerce_attribute_taxonomies: ✔
woocommerce_downloadable_product_permissions: ✔
woocommerce_order_items: ✔
woocommerce_order_itemmeta: ✔
woocommerce_tax_rates: ✔
woocommerce_tax_rate_locations: ✔
woocommerce_shipping_zones: ✔
woocommerce_shipping_zone_locations: ✔
woocommerce_shipping_zone_methods: ✔
woocommerce_payment_tokens: ✔
woocommerce_payment_tokenmeta: ✔

### Active Plugins (34) ###

bbPress: by The bbPress Community – 2.5.10
Chimpy: by RightPress – 2.1.3
Clone Posts: by Lukasz Kostrzewa – 1.0
Enhanced E-commerce for Woocommerce store: by Tatvic – 1.0.18
Insert Headers and Footers: by WPBeginner – 1.3.3
MailChimp for WordPress: by ibericode – 3.1.7
Menu Icons: by Dzikri Aziz – 0.10.1
Olark for WP: by Russell Osborne – 2.5.1
Optimizely: by Optimizely Inc. – 3.7.5
Page Links To: by Mark Jaquith – 2.9.6
Cart Product Feed: by ExportFeed.com – 3.1.5.5
Recover Abandoned Cart: by Fantastic Plugins – 8.8
Telnumlinker: by Stoatoffear – 1.2
WooCommerce Dynamic Pricing & Discounts: by RightPress – 1.0.3
WooCommerce Amazon Payments Advanced Gateway: by WooThemes – 1.2.7 – 1.5.4 is available
WooCommerce Stripe Gateway: by Automattic – 3.0.2
Woocommerce Adwords Conversion Tracking: by Víctor Falcón – 1.0.1
WooCommerce Google Trusted Stores Integration: by enollo – 1.0.0
Woocommerce Mailchimp Discount: by Magnigenie – 2.0
WooCommerce MailChimp: by Adam Anderly – 1.3.7
WooCommerce Menu Cart: by Jeremiah Prummer
Ewout Fernhout – 2.5.7

Woocommerce Products Per Page: by Jeroen Sormani – 1.2.2
WooCommerce UPS Shipping: by WooThemes – 3.1.2 – 3.1.3 is available
WooCommerce USPS Shipping: by WooThemes – 4.3.2 – 4.3.3 is available
WooCommerce - ShipStation Integration: by WooThemes – 4.1.5 – 4.1.6 is available
WooCommerce Shipwire: by WooThemes / SkyVerge – 1.5.1 – 2.0.0 is available
WooCommerce Sponsor a Friend Plugin: by MB Création – 2.3
WooCommerce Subscriptions: by Prospress Inc. – 2.0.19
WooCommerce: by WooThemes – 2.6.4
WooCommerce Helper: by WooCommerce – 1.7.0
WordPress Importer: by wordpressdotorg – 0.6.1
Yoast SEO: by Team Yoast – 3.4.2
WP-Mail-SMTP: by Callum Macdonald – 0.9.5
WPFront User Role Editor: by Syam Mohan – 2.12.4

### Settings ###

Force SSL: ✔
Currency: USD ($)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2

### API ###

API Enabled: ✔

### WC Pages ###

Shop Base: #3773 - /shop/
Cart: #3774 - /cart/
Checkout: #3775 - /checkout/
My Account: #3776 - /my-account/

### Taxonomies ###

Product Types: external (external)
grouped (grouped)
simple (simple)
subscription (subscription)
variable (variable)
variable subscription (variable-subscription)

### Theme ###

Name: Enfold Child
Version: 1.0
Author URL: http://kriesi.at
Child Theme: ✔
Parent Theme Name: Enfold
Parent Theme Version: 3.8
Parent Theme Author URL: http://kriesi.at
WooCommerce Support: ✔

### Templates ###

Overrides: enfold-child/woocommerce/emails/admin-new-order.php version 2.0.0 is out of date. The core version is 2.5.0
: Learn how to update outdated templates

Here you go:

https://s9.postimg.org/58zal7tbj/error1.png

Way to reproduced this error ;

Open Private Mode window in IE
1. Go to https://ecoraiderusa.com/shop
2. add to card one item.
3. Go to checkout.
4. on page – https://ecoraiderusa.com/checkout/ enter any fake information and fill all information with fake credit card info and click “Place Order”

Yes you are allowed to deactivate plugin and test, please login below. I rather you guys take a look first :)

Really appreciate this!