Add to Cart button not working

The Add to Cart button is not working. The settings are set up to redirect to the cart, but it just redirects back to the page you were on and then clicking through to the cart shows an empty cart. I’m not seeing any js errors or anything.

I’ve tried switching themes and disabling plugins and get the same issue.

Thanks for your help!

https://happyllamainc.com/product/route-shirt-ride-the-rockies-2016/

Sytem Status is below:

### WordPress Environment ###

Home URL: https://happyllamainc.com
Site URL: https://happyllamainc.com
WC Version: 2.5.2
Log Directory Writable: ?  D:\Hosting\2603525\html/wp-content/uploads//wc-logs/
WP Version: 4.3.1
WP Multisite: –
WP Memory Limit: 256 MB
WP Debug Mode: –
Language: en_US

### Server Environment ###

Server Info: Microsoft-IIS/7.0
PHP Version: 5.4.16
PHP Post Max Size: 8 MB
PHP Time Limit: 300
PHP Max Input Vars: 1000
SUHOSIN Installed: –
MySQL Version: 5.5.43
Max Upload Size: 8 MB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Remote Post: ?
Remote Get: ?

### Database ###

WC Database Version: 2.5.2
:
woocommerce_sessions: ?
woocommerce_api_keys: ?
woocommerce_attribute_taxonomies: ?
woocommerce_termmeta: ?
woocommerce_downloadable_product_permissions: ?
woocommerce_order_items: ?
woocommerce_order_itemmeta: ?
woocommerce_tax_rates: ?
woocommerce_tax_rate_locations: ?

### Active Plugins (6) ###

LayerSlider WP: by Kreatura Media – 5.5.1
Fusion Core: by ThemeFusion – 1.7.5.1
Revolution Slider: by ThemePunch – 4.6.93
UpdraftPlus - Backup/Restore: by UpdraftPlus.Com
DavidAnderson – 2.11.23.22

WooCommerce: by WooThemes – 2.5.2
Yoast SEO: by Team Yoast – 3.0.7

### Settings ###

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

### API ###

API Enabled: ?
API Version: 3.1.0

### WC Pages ###

Shop Base: #417 - /shop/
Cart: #418 - /cart/
Checkout: #419 - /checkout/
My Account: #420 - /my-account/

### Taxonomies ###

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

### Theme ###

Name: Avada Child
Version: 1.0.0
Author URL: https://theme-fusion.com
Child Theme: ?
Parent Theme Name: Avada
Parent Theme Version: 3.8.6.1
Parent Theme Author URL: https://themeforest.net/user/ThemeFusion
WooCommerce Support: ?

### Templates ###

Overrides: Avada/woocommerce/cart\cart.php
Avada/woocommerce/cart\shipping-calculator.php
Avada/woocommerce/checkout\form-checkout.php
Avada/woocommerce/checkout\form-pay.php
Avada/woocommerce/checkout\review-order.php
Avada/woocommerce/checkout\thankyou.php
Avada/woocommerce/content-product.php
Avada/woocommerce/loop\loop-start.php
Avada/woocommerce/loop\pagination.php
Avada/woocommerce/myaccount\form-edit-address.php
Avada/woocommerce/single-product\add-to-cart\variable.php
Avada/woocommerce/single-product\product-image.php
Avada/woocommerce/single-product\product-thumbnails.php
Avada/woocommerce/single-product\short-description.php
Avada/woocommerce/single-product\tabs\description.php
Avada/woocommerce/single-product\title.php

https://www.ads-software.com/plugins/woocommerce/