Fatal error: Call to a member function get_cart_contents_count() on null

This message is presented after clicking “update” once edited a page. The update seems to take place, but just a white page with this error is displayed.

If I click back in the browser, the effects have taken place.

Any ideas on how to fix this?

Fatal error: Call to a member function get_cart_contents_count() on null in /wp-content/plugins/woocommerce-cart-tab/includes/cart-tab-templates.php on line 13

Thanks,
Lewis

### WordPress Environment ###

Home URL: https://www.woolmersales.co.uk
Site URL: https://www.woolmersales.co.uk
WC Version: 3.2.1
Log Directory Writable: ?
WP Version: 4.8.2
WP Multisite: –
WP Memory Limit: 2 GB
WP Debug Mode: –
WP Cron: ?
Language: en_GB

### Server Environment ###

Server Info: Apache
PHP Version: 5.6.31
PHP Post Max Size: 8 MB
PHP Time Limit: 180
PHP Max Input Vars: 6000
cURL Version: 7.55.1
OpenSSL/1.0.2k

SUHOSIN Installed: –
MySQL Version: 5.6.37
Max Upload Size: 8 MB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Remote Post: ?
Remote Get: ?

### Database ###

WC Database Version: 3.2.1
WC Database Prefix: wp_
Total Database Size: 202.17MB
Database Data Size: 122.95MB
Database Index Size: 79.22MB
wp_woocommerce_sessions: Data: 40.08MB + Index: 1.02MB
wp_woocommerce_api_keys: Data: 0.02MB + Index: 0.03MB
wp_woocommerce_attribute_taxonomies: Data: 0.08MB + Index: 0.05MB
wp_woocommerce_downloadable_product_permissions: Data: 0.02MB + Index: 0.03MB
wp_woocommerce_order_items: Data: 0.14MB + Index: 0.06MB
wp_woocommerce_order_itemmeta: Data: 1.52MB + Index: 1.81MB
wp_woocommerce_tax_rates: Data: 0.02MB + Index: 0.06MB
wp_woocommerce_tax_rate_locations: Data: 0.02MB + Index: 0.05MB
wp_woocommerce_shipping_zones: Data: 0.02MB + Index: 0.00MB
wp_woocommerce_shipping_zone_locations: Data: 0.02MB + Index: 0.05MB
wp_woocommerce_shipping_zone_methods: Data: 0.02MB + Index: 0.00MB
wp_woocommerce_payment_tokens: Data: 0.02MB + Index: 0.02MB
wp_woocommerce_payment_tokenmeta: Data: 0.02MB + Index: 0.03MB
wp_woocommerce_log: Data: 0.00MB + Index: 0.00MB
wp_cleantalk_sfw: Data: 0.00MB + Index: 0.00MB
wp_cleantalk_sfw_logs: Data: 0.00MB + Index: 0.00MB
wp_commentmeta: Data: 0.02MB + Index: 0.03MB
wp_comments: Data: 0.13MB + Index: 0.09MB
wp_frm_fields: Data: 0.00MB + Index: 0.01MB
wp_frm_forms: Data: 0.00MB + Index: 0.00MB
wp_frm_items: Data: 0.02MB + Index: 0.02MB
wp_frm_item_metas: Data: 0.01MB + Index: 0.02MB
wp_gg_folders: Data: 0.02MB + Index: 0.00MB
wp_gg_galleries: Data: 0.02MB + Index: 0.00MB
wp_gg_galleries_excluded: Data: 0.02MB + Index: 0.00MB
wp_gg_galleries_resources: Data: 0.02MB + Index: 0.00MB
wp_gg_photos: Data: 0.02MB + Index: 0.00MB
wp_gg_photos_pos: Data: 0.02MB + Index: 0.00MB
wp_gg_photos_settings: Data: 0.02MB + Index: 0.00MB
wp_gg_settings_presets: Data: 0.02MB + Index: 0.00MB
wp_gg_settings_sets: Data: 0.02MB + Index: 0.00MB
wp_gg_stats: Data: 0.02MB + Index: 0.00MB
wp_gg_tags: Data: 0.02MB + Index: 0.00MB
wp_links: Data: 0.02MB + Index: 0.02MB
wp_msf_fileds: Data: 0.02MB + Index: 0.00MB
wp_options: Data: 9.20MB + Index: 1.36MB
wp_postmeta: Data: 35.58MB + Index: 31.11MB
wp_posts: Data: 5.52MB + Index: 4.91MB
wp_pp_login_builder: Data: 0.02MB + Index: 0.00MB
wp_pp_password_reset_builder: Data: 0.02MB + Index: 0.00MB
wp_pp_registration_builder: Data: 0.02MB + Index: 0.00MB
wp_relevanssi: Data: 14.38MB + Index: 22.27MB
wp_relevanssi_log: Data: 0.02MB + Index: 0.00MB
wp_relevanssi_stopwords: Data: 0.02MB + Index: 0.00MB
wp_sg_age_restriction_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_contact_form_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_countdown_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_exit_intent_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_fblike_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_html_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_iframe_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_image_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_popup_addons: Data: 0.02MB + Index: 0.02MB
wp_sg_popup_addons_connection: Data: 0.02MB + Index: 0.00MB
wp_sg_popup_in_pages: Data: 0.02MB + Index: 0.02MB
wp_sg_popup_settings: Data: 0.02MB + Index: 0.00MB
wp_sg_shortCode_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_social_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_subscribers: Data: 0.02MB + Index: 0.00MB
wp_sg_subscription_error_log: Data: 0.02MB + Index: 0.00MB
wp_sg_subscription_popup: Data: 0.02MB + Index: 0.00MB
wp_sg_video_popup: Data: 0.02MB + Index: 0.00MB
wp_statistics_exclusions: Data: 0.00MB + Index: 0.00MB
wp_statistics_historical: Data: 0.00MB + Index: 0.00MB
wp_statistics_pages: Data: 2.90MB + Index: 5.90MB
wp_statistics_search: Data: 0.58MB + Index: 0.37MB
wp_statistics_useronline: Data: 0.08MB + Index: 0.00MB
wp_statistics_visit: Data: 0.00MB + Index: 0.01MB
wp_statistics_visitor: Data: 4.58MB + Index: 4.37MB
wp_termmeta: Data: 0.52MB + Index: 0.69MB
wp_terms: Data: 0.30MB + Index: 0.36MB
wp_term_relationships: Data: 1.52MB + Index: 1.52MB
wp_term_taxonomy: Data: 0.38MB + Index: 0.56MB
wp_usermeta: Data: 1.52MB + Index: 1.64MB
wp_users: Data: 0.06MB + Index: 0.05MB
wp_wangguardcronjobs: Data: 0.00MB + Index: 0.00MB
wp_wangguardquestions: Data: 0.00MB + Index: 0.00MB
wp_wangguardreportqueue: Data: 0.00MB + Index: 0.00MB
wp_wangguardsignupsstatus: Data: 0.00MB + Index: 0.00MB
wp_wangguarduserstatus: Data: 0.00MB + Index: 0.00MB
wp_wdslayer: Data: 0.02MB + Index: 0.00MB
wp_wdsslide: Data: 0.02MB + Index: 0.00MB
wp_wdsslider: Data: 0.02MB + Index: 0.00MB
wp_wfBadLeechers: Data: 0.00MB + Index: 0.00MB
wp_wfBlockedIPLog: Data: 0.00MB + Index: 0.00MB
wp_wfBlocks: Data: 0.00MB + Index: 0.00MB
wp_wfBlocksAdv: Data: 0.00MB + Index: 0.00MB
wp_wfConfig: Data: 0.23MB + Index: 0.01MB
wp_wfCrawlers: Data: 0.00MB + Index: 0.00MB
wp_wfFileMods: Data: 1.36MB + Index: 0.29MB
wp_wfHits: Data: 0.30MB + Index: 0.11MB
wp_wfHoover: Data: 0.00MB + Index: 0.00MB
wp_wfIssues: Data: 0.00MB + Index: 0.00MB
wp_wfKnownFileList: Data: 0.69MB + Index: 0.09MB
wp_wfLeechers: Data: 0.07MB + Index: 0.06MB
wp_wfLockedOut: Data: 0.00MB + Index: 0.00MB
wp_wfLocs: Data: 0.00MB + Index: 0.00MB
wp_wfLogins: Data: 0.00MB + Index: 0.00MB
wp_wfNet404s: Data: 0.01MB + Index: 0.01MB
wp_wfNotifications: Data: 0.00MB + Index: 0.00MB
wp_wfPendingIssues: Data: 0.00MB + Index: 0.00MB
wp_wfReverseCache: Data: 0.00MB + Index: 0.00MB
wp_wfScanners: Data: 0.01MB + Index: 0.01MB
wp_wfSNIPCache: Data: 0.00MB + Index: 0.00MB
wp_wfStatus: Data: 0.07MB + Index: 0.03MB
wp_wfThrottleLog: Data: 0.00MB + Index: 0.00MB
wp_wfVulnScanners: Data: 0.00MB + Index: 0.00MB
wp_wpuf_transaction: Data: 0.00MB + Index: 0.00MB
wp_WPUser_LoginAttempts: Data: 0.02MB + Index: 0.00MB
wp_wpuser_login_log: Data: 0.02MB + Index: 0.00MB
wp_yoast_seo_links: Data: 0.03MB + Index: 0.01MB
wp_yoast_seo_meta: Data: 0.04MB + Index: 0.04MB

### Post Type Counts ###

attachment: 6476
cf7_style: 13
customize_changeset: 1
eps-slider: 1
frm_form_actions: 2
frm_styles: 1
optionsframework: 5
page: 12
popup_theme: 6
post: 2
product: 2183
product_variation: 5889
revision: 572
shop_coupon: 1
shop_options: 1
shop_order: 358
shop_order_refund: 3
woo_discount: 1
wpcf7_contact_form: 1
wpuf_forms: 1
wpuf_input: 2
yith_wcps_type: 1

### Security ###

Secure connection (HTTPS): ?Your store is not using HTTPS. Learn more about HTTPS and SSL Certificates.
Hide errors from visitors: ?

### Active Plugins (49) ###

Advanced Browser Check: by Mattias Hedman – 4.4.1
Async JavaScript: by Clough I.T. Solutions – 2.17.09.31
Banner Management for WooCommerce: by Multidots – 1.0.9 – Not tested with the active version of WooCommerce
Cherry Plugin: by Cherry Team. – 1.2.7
Anti-Spam by CleanTalk: by СleanTalk  – 5.78
Contact Form 7 Style: by Johnny
dorumarginean
mlehelsz
MirceaR – 3.1.2

Contact Form 7: by Takayuki Miyoshi – 4.9
CropRefine: by era404 – 0.9.8
Custom Related Products for WooCommerce: by Scott Nelle – 1.3 – Not tested with the active version of WooCommerce
Easy Panorama: by Leonardo Giacone – 1.0.2
Enable Media Replace: by M?ns Jonasson – 3.1.1
Exclude Pages from Navigation: by Simon Wheatley – 1.92
Export User Data: by Q Studio – 1.3.1
Formidable Forms: by Strategy11 – 2.05.02
Load More Products for WooCommerce: by BeRocket – 1.0.8 – Not tested with the active version of WooCommerce
MotoPress Content Editor: by MotoPress – 1.6.0
NC Grid List View For Woocommerce: by Nabaraj Chapagain – 1.0.1 – Not tested with the active version of WooCommerce
Nice Search: by Mark Jaquith – 0.5
Perfect WooCommerce Brands: by Alberto de Vera Sevilla – 1.5.2 – Not tested with the active version of WooCommerce
WooCommerce Local Shop: by Phil Meadows – 1.0 – Not tested with the active version of WooCommerce
Popup Builder PRO: by Sygnoos – 3.1.6
Post Thumbnail Editor: by sewpafly – 2.4.8
Recently Registered: by Mika Epstein – 3.4.3
Relevanssi: by Mikko Saari – 3.6.2
SKU Error Fixer for WooCommerce: by WordPress Monsters – 1.0 – Not tested with the active version of WooCommerce
Slider WD: by WebDorado – 1.1.92
Social Media Feather: by socialmediafeather – 1.8.4
WP woocommerce featured product by category: by WP Online Support – 1.1 – Not tested with the active version of WooCommerce
Tawk.to Live Chat: by Tawkto – 0.3.3
User Spam Remover: by Joel Hardi – 1.0
WooCommerce Variation Swatches: by ThemeAlien – 1.0.3 – Not tested with the active version of WooCommerce
Product Customer List for WooCommerce: by Kokomo – 2.6.0 – Not tested with the active version of WooCommerce
WooCommerce Tree Table Rate Shipping: by tablerateshipping.com – 1.16.4
WooCommerce Product Image Gallery Options: by Create and Code – 1.0.2 – Not tested with the active version of WooCommerce
WooCommerce Bulk Discount: by Rene Puchinger – 2.4.5 – Not tested with the active version of WooCommerce
WooCommerce Cart Tab: by jameskoster – 1.1.1 – Not tested with the active version of WooCommerce
WooCommerce - Embed Videos To Product Image Gallery: by ZealousWeb Technologies – 2.2 – Not tested with the active version of WooCommerce
Booster for WooCommerce: by Algoritmika Ltd – 3.2.0 – Not tested with the active version of WooCommerce
Woocommerce Products Per Page: by Jeroen Sormani – 1.2.3 – Not tested with the active version of WooCommerce
WooCommerce Unit Of Measure: by Bradley Davis – 1.1 – Not tested with the active version of WooCommerce
WooCommerce: by Automattic – 3.2.1
Yoast SEO: by Team Yoast – 5.7.1
WP Fastest Cache: by Emre Vona – 0.8.7.4
WP-Mail-SMTP: by Callum Macdonald – 0.10.1
WP Max Submit Protect: by Academe Computing – 1.1.2 – Not tested with the active version of WooCommerce
WP Statistics: by WP-Statistics Team – 12.1.3
Custom Product Tabs for WooCommerce: by YIKES
Inc. – 1.6.2 – Not tested with the active version of WooCommerce

YITH Purchased Column for WooCommerce: by YITHEMES – 1.0.4 – Not tested with the active version of WooCommerce
YITH WooCommerce Product Slider Carousel: by YITHEMES – 1.0.14

### Settings ###

API Enabled: ?
Force SSL: ?
Currency: GBP (￡)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2
Taxonomies: Product Types: external (external)
grouped (grouped)
simple (simple)
variable (variable)

Taxonomies: Product Visibility: exclude-from-catalog (exclude-from-catalog)
exclude-from-search (exclude-from-search)
featured (featured)
outofstock (outofstock)
rated-1 (rated-1)
rated-2 (rated-2)
rated-3 (rated-3)
rated-4 (rated-4)
rated-5 (rated-5)

### WC Pages ###

Shop base: #13 - /shop/
Basket: #14 - /basket/
Checkout: #15 - /checkout/
My account: #16 - /my-account/
Terms and conditions: ? Page not set

### Theme ###

Name: free_interior_woocommerce
Version: 3.1
Author URL: https://info.template-help.com/help/
Child Theme: ?
Parent Theme Name: cherry
Parent Theme Version: 3.1.5
Parent Theme Author URL: //info.template-help.com/help/
WooCommerce Support: ?

### Templates ###

Overrides: free_interior_woocommerce/woocommerce/emails/email-styles.php
free_interior_woocommerce/woocommerce/single-product/product-image.php