checkout ajax spinning

Hello,

I can not manage issue with checkout process.
When I add some products into cart and make checkout.
Checkout page stuck on ajax spinning disk.

Can you help me with this issue ?

### WordPress Environment ###

Home URL: https://d.websupport.sk/www.trapez.sk
Site URL: https://d.websupport.sk/www.trapez.sk
WC Version: 2.6.14
Log Directory Writable: ?
WP Version: 4.7.2
WP Multisite: –
WP Memory Limit: 256 MB
WP Debug Mode: –
WP Cron: ?
Language: sk_SK

### Server Environment ###

Server Info: Apache
PHP Version: 5.6.30
PHP Post Max Size: 48 MB
PHP Time Limit: 30
PHP Max Input Vars: 1000
cURL Version: 7.47.0
OpenSSL/1.0.2g

SUHOSIN Installed: –
Max Upload Size: 48 MB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Vzdialená metóda Post: ?
Vzdialená metóda Get: ?

### Database ###

WC Database Version: 2.6.14
: 
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 (18) ###

Redux Framework: Team Redux – 3.6.3
Breadcrumb NavXT: John Havlik – 5.6.0
Contact Form 7: Takayuki Miyoshi – 4.7
Customize Woocommerce Shop: RepUPress.com – 6.0
Enhanced Media Library: wpUXsolutions – 2.4.4
EWWW Image Optimizer: Shane Bishop – 3.2.7
WooCommerce Quickview: Iconic – 3.4.2
Max Mega Menu: Tom Hemsley – 2.3.5
WooCommerce Product Filter: Mihajlovic Nenad – 6.1.1
Slider Revolution: ThemePunch – 5.3.1
Swift Framework: Swift Ideas – 2.5.31
Woocommerce CSV import attributes: Allaerd Mensonides – 3.2
Woocommerce CSV import variable products: Allaerd Mensonides – 3.1.5
Woocommerce CSV Import: Allaerd Mensonides – 3.3.5
WooCommerce Stock Manager: Vladislav Musílek – 1.1.3
WooCommerce: WooThemes – 2.6.14
Wordfence Security: Wordfence – 6.3.2
WP No Base Permalink: Sergio P.A. ( 23r9i0 ) – 0.3.1

### Settings ###

Force SSL: –
Currency: EUR (€)
Currency Position: right_space
Thousand Separator: 
Decimal Separator: ,
Number of Decimals: 2

### API ###

API Enabled: ?

### WC Pages ###

Slug pre obchod: #44 - /eshop
Ko?ík: #267 - /kosik
Pokladňa: #268 - /kontrola-objednavky
M?j ú?et: #269 - /moj-ucet

### Taxonomies ###

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

### Theme ###

Name: Uplift
Version: 1.3.20
Author URL: https://www.swiftideas.com
Child Theme: ? – Ak upravujete WooCommerce alebo nadradenú tému
ktorej autorom nie ste vy
odporú?ame vám pou?i? rad?ej odvodenú tému. Pre?ítajte si návod Ako vytvori? odvodenú tému.

WooCommerce Support: ?

### Templates ###

Overrides: uplift/woocommerce/archive-product.php
uplift/woocommerce/cart/cart-totals.php
uplift/woocommerce/cart/cart.php
uplift/woocommerce/checkout/form-checkout.php
uplift/woocommerce/checkout/thankyou.php
uplift/woocommerce/content-product.php
uplift/woocommerce/content-product_cat.php
uplift/woocommerce/content-single-product.php
uplift/woocommerce/global/quantity-input.php
uplift/woocommerce/loop/add-to-cart.php
uplift/woocommerce/loop/loop-end.php
uplift/woocommerce/loop/loop-start.php
uplift/woocommerce/loop/orderby.php
uplift/woocommerce/loop/pagination.php
uplift/woocommerce/loop/result-count.php
uplift/woocommerce/myaccount/form-login.php
uplift/woocommerce/myaccount/my-address.php
uplift/woocommerce/myaccount/my-orders.php
uplift/woocommerce/order/order-details-item.php
uplift/woocommerce/single-product/add-to-cart/external.php
uplift/woocommerce/single-product/add-to-cart/grouped.php
uplift/woocommerce/single-product/add-to-cart/simple.php
uplift/woocommerce/single-product/add-to-cart/variable.php
uplift/woocommerce/single-product/product-image.php
uplift/woocommerce/single-product/product-thumbnails.php
uplift/woocommerce/single-product/related.php
uplift/woocommerce/single-product/review.php
uplift/woocommerce/single-product/tabs/additional-information.php
uplift/woocommerce/single-product/tabs/description.php
uplift/woocommerce/single-product/tabs/tabs.php
uplift/woocommerce/single-product/up-sells.php
uplift/woocommerce/single-product-reviews.php
uplift/woocommerce/single-product.php