Billing/Shipping Customer Fields not working

After upgrading to WooCommerce 2.5.2 most of the required fields for checking out are not active for editing by clients. Below I provide the System Report for more info:

### WordPress Environment ###

Home URL: https://shop.prospecdesigns.eu
Site URL: https://shop.prospecdesigns.eu
WC Version: 2.5.2
Log Directory Writable: ? /home/prospe50/public_html/shop/wp-content/uploads/wc-logs/
WP Version: 4.4.2
WP Multisite: ?
WP Memory Limit: 256 MB
WP Debug Mode: –
Language: en_US

### Server Environment ###

Server Info: Apache
PHP Version: 5.4.45
PHP Post Max Size: 128 MB
PHP Time Limit: 30
PHP Max Input Vars: 1000
SUHOSIN Installed: –
MySQL Version: 5.6.28
Max Upload Size:
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 (1) ###

Basement Framework: by Aisconverse team – 1.0
Official MailerLite Sign Up Forms: by MailerGroup – 1.0.18
Basement Framework: by Aisconverse team – 1.0
Contact Form 7: by Takayuki Miyoshi – 4.3.1
WooCommerce EU VAT Compliance (Free): by David Anderson – 1.10.16
Yoast SEO: by Team Yoast – 3.0.7
Clef: by Clef – 2.3.4
Google Analytics by Yoast: by Team Yoast – 5.4.6
Google XML Sitemaps: by Arne Brachhold – 4.0.8
WooCommerce: by WooThemes – 2.5.2
WP Super Cache: by Automattic – 1.4.7
Multilanguage by BestWebSoft: by BestWebSoft – 1.1.3
UpdraftPlus – Backup/Restore: by UpdraftPlus.Com
DavidAnderson – 1.11.23

WooCommerce Print Invoice/Packing list: by WooThemes / SkyVerge – 2.7.0
WooMobile: by Bowdie Mercieca – 1.2.4
WooCommerce Product Documents: by WooThemes / SkyVerge – 1.5.0
Bad Behavior: by Michael Hampton – 2.2.18
Google AdSense: by Google – 1.2.1
WooCommerce Order Status Change Notifier: by WooThemes – 1.0.1
WP Menu Cart Pro: by Jeremiah Prummer
Ewout Fernhout – 2.5.7

WooCommerce Google Analytics Integration: by WooThemes – 1.4.0
WooCommerce Checkout Field Editor: by WooThemes – 1.4.10
WooCommerce Table Rate Shipping: by Mike Jolley – 2.9.2
WooThemes Helper: by WooThemes – 1.5.9
WP Overnight Sidekick: by Jeremiah Prummer – 1.0.1

### Settings ###

Force SSL: –
Currency: EUR (€)
Currency Position: right
Thousand Separator: .
Decimal Separator: ,
Number of Decimals: 0

### API ###

API Enabled: ?
API Version: 3.1.0

### WC Pages ###

Shop Base: #9 – /gaming-desks-eshop/
Cart: #10 – /cart/
Checkout: #11 – /checkout/
My Account: #12 – /my-account/

### Taxonomies ###

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

### Theme ###

Name: Yokko Child Theme
Version: 1.0
Author URL: https://aisconverse.com
Child Theme: ?
Parent Theme Name: Yokko
Parent Theme Version: 1.8
Parent Theme Author URL: https://aisconverse.com
WooCommerce Support: ?

### Templates ###

Overrides: yokko/woocommerce/archive-product.php
yokko/woocommerce/cart/cart-empty.php
yokko/woocommerce/cart/cart-item-data.php version 2.1.0 is out of date. The core version is 2.4.0
yokko/woocommerce/cart/cart-shipping.php version 2.3.0 is out of date. The core version is 2.5.0
yokko/woocommerce/cart/cart-totals.php
yokko/woocommerce/cart/cart.php
yokko/woocommerce/cart/mini-cart.php version 2.1.0 is out of date. The core version is 2.5.0
yokko/woocommerce/cart/shipping-calculator.php
yokko/woocommerce/checkout/cart-errors.php version 1.6.4 is out of date. The core version is 2.4.0
yokko/woocommerce/checkout/form-billing.php
yokko/woocommerce/checkout/form-checkout.php
yokko/woocommerce/checkout/form-coupon.php
yokko/woocommerce/checkout/form-login.php
yokko/woocommerce/checkout/form-pay.php version 1.6.4 is out of date. The core version is 2.5.0
yokko/woocommerce/checkout/form-shipping.php
yokko/woocommerce/checkout/review-order.php
yokko/woocommerce/checkout/thankyou.php
yokko/woocommerce/content-product_cat.php version 1.6.4 is out of date. The core version is 2.5.2
yokko/woocommerce/content-single-product.php
yokko/woocommerce/content-widget-product.php version – is out of date. The core version is 2.5.0
yokko/woocommerce/global/form-login.php
yokko/woocommerce/global/quantity-input.php version 2.1.0 is out of date. The core version is 2.5.0
yokko/woocommerce/loop/add-to-cart.php version 2.1.0 is out of date. The core version is 2.5.0
yokko/woocommerce/loop/no-products-found.php
yokko/woocommerce/loop/pagination.php
yokko/woocommerce/loop/result-count.php
yokko/woocommerce/loop/sale-flash.php
yokko/woocommerce/myaccount/form-add-payment-method.php
yokko/woocommerce/myaccount/form-edit-account.php version 2.2.7 is out of date. The core version is 2.5.1
yokko/woocommerce/myaccount/form-edit-address.php
yokko/woocommerce/myaccount/form-login.php
yokko/woocommerce/myaccount/form-lost-password.php
yokko/woocommerce/myaccount/my-account.php
yokko/woocommerce/myaccount/my-address.php
yokko/woocommerce/myaccount/my-downloads.php
yokko/woocommerce/myaccount/my-orders.php version 2.2.0 is out of date. The core version is 2.5.0
yokko/woocommerce/myaccount/view-order.php
yokko/woocommerce/notices/error.php
yokko/woocommerce/notices/notice.php
yokko/woocommerce/notices/success.php
yokko/woocommerce/order/order-details.php version 2.3.0 is out of date. The core version is 2.5.0
yokko/product-searchform.php version – is out of date. The core version is 2.5.0
yokko/woocommerce/single-product/add-to-cart/external.php
yokko/woocommerce/single-product/add-to-cart/grouped.php
yokko/woocommerce/single-product/add-to-cart/simple.php
yokko/woocommerce/single-product/add-to-cart/variable.php version 2.3.0 is out of date. The core version is 2.5.0
yokko/woocommerce/single-product/meta.php
yokko/woocommerce/single-product/price.php version 1.6.4 is out of date. The core version is 2.4.9
yokko/woocommerce/single-product/product-image.php
yokko/woocommerce/single-product/product-thumbnails.php
yokko/woocommerce/single-product/rating.php
yokko/woocommerce/single-product/related.php
yokko/woocommerce/single-product/review.php version 2.1.0 is out of date. The core version is 2.5.0
yokko/woocommerce/single-product/sale-flash.php
yokko/woocommerce/single-product/tabs/additional-information.php
yokko/woocommerce/single-product/tabs/description.php
yokko/woocommerce/single-product/tabs/tabs.php version 2.0.0 is out of date. The core version is 2.4.0
yokko/woocommerce/single-product/title.php
yokko/woocommerce/single-product-reviews.php
yokko/woocommerce/single-product.php

: Learn how to update outdated templates’

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