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Knowledge Base

Fix “Call to undefined function str_starts_with()” in Contact Form 7
Fix “Unexpected character in json data” in WP Migrate Lite
Fix “Cannot access offset of type string on string” in WPForms (Name field)
Fix “There was an error connecting to the Wordfence scanning servers” in Wordfence
Fix “chmod(): Operation not permitted in wp-fastest-cache” in WP Fastest Cache
Fix “HTTP 413 Payload Too Large” in Smush Bulk Smush
Fix “Fatal error: Uncaught Error: Call to undefined function mb_strtolower()” in All in One SEO (AIOSEO)
Fix “Your API key is invalid” in Akismet Anti-spam
Fix “Data error in Analytics. There was a critical error on this website while fetching data” in Site Kit by Google
Fix “Sorry, you cannot list resources” (403 woocommerce_rest_cannot_view) in the WooCommerce REST API
Fix “UserTemplates::add_template_states() must be of the type array” Fatal Error in WPForms
Fix “Call to a member function get_component() on null” in Elementor AI module
Fix “Call to undefined method PatternsHelper::get_image_url()” in WooCommerce Blocks AI content
Fix “Unable to release actions from claim id 0” in WooCommerce Action Scheduler
Fix “Fatal error: Uncaught Error: Call to undefined function curl_exec()” in Wordfence
Fix “Unable to save temporary file for atomic writing” in Wordfence
Fix “Minified React error #200” in the Yoast SEO Post Editor
Fix “There was a problem while sending the test email” in WP Mail SMTP
Fix “Minify error: failed to open stream: No such file or directory” in W3 Total Cache
Fix “getPostType is not a function” in Yoast SEO
Fix “Outbound HTTPS not working” in Jetpack
Fix “X-LiteSpeed-Purge request failed (403 Forbidden)” in LiteSpeed Cache
Fix “Class Elementor\Modules\WpRest\Classes\Elementor_Post_Meta not found” After Updating Elementor
Fix “Class Elementor\Core\Schemes\Color not found” Fatal Error in Elementor + ColorMag
Fix “Domain Key is invalid” in LiteSpeed Cache (QUIC.cloud)
Fix “Cannot use object of type WP_Error as array” in WPForms CacheBase.php
Fix “site_inaccessible: The Jetpack server could not communicate with your site”
Fix “WP_CACHE is not enabled in your wp-config.php” in WP Super Cache
Fix “Mod_Rewrite is not working” in WP Fastest Cache
Fix “PCLZIP_ERR_BAD_FORMAT (-10): Unable to find End of Central Dir Record signature” in UpdraftPlus
Fix “cURL error 60: SSL certificate problem: unable to get local issuer certificate” in Akismet
Fix “Authorization failed. Error: redirect_uri_mismatch” in Rank Math (Google connection)
Fix Jetpack “XML-RPC server accepts POST requests only” When Connecting
Fix “Sorry, we do not ship to your location.” in WooCommerce
Fix WooCommerce HPOS “Table ‘wp_wc_orders’ doesn’t exist” (Without Breaking Orders)
Fix “Page caching is disabled because your site uses the ‘Set-Cookie’ header” in WP Rocket
Fix “element_id and type do not match for table ‘icl_translations’” in WPML
Fix “INVALID_RESOURCE_ID / RESOURCE_NOT_FOUND” in WooCommerce PayPal Payments
Fix “No such PaymentMethod: ‘pm_…’” in WooCommerce Stripe
Fix “There was a problem with your submission. Please try again later.” in WPForms
Fix “Error processing checkout. Please try again.” in WooCommerce
Fix “SMTP connect() failed” / “Could not connect to SMTP host” in WP Mail SMTP
Fix Wordfence: “wp_remote_post() test back to this server failed”
Fix: LiteSpeed Cache “Page is cached but the ESI block failed to render”
WooCommerce: “There appears to be a problem with your site’s checkout configuration”
Fix All-in-One WP Migration: “Unable to import: Missing manifest.json”
Fix “The response is not a valid JSON response” in The Events Calendar (saving events)
Fix “API Request Error: 401 – API Key Invalid” in Mailchimp for WordPress (MC4WP)
Fix Smush “cURL error 28: Operation timed out” During Bulk Optimize
Site Kit Error: “The response is not a valid JSON response” – How to Fix It
UpdraftPlus – “Backup aborted: the database backup has not completed” (Fix)
Contact Form 7: “reCAPTCHA validation failed. Please try again.”
Fix “Your card was declined” in WooCommerce Stripe (and “Card does not support this purchase”)
Fix: WooCommerce PayPal Payments “Things don’t appear to be working at the moment”
WooCommerce: “Sorry, your session has expired. Return to shop.” – How to Fix It
Fix: Yoast SEO “Unknown column ‘inclusive_language_score’ in ‘field list’” (or “‘blog_id’”)
Fix “The preview could not be loaded” in Elementor (Step-by-Step)
Which WordPress Hosts Offer Telephone Support
Fix WooCommerce “There are no payment methods available”
Fix: Stripe “You passed an empty string for ‘payment_method’” in WooCommerce (Payment Plugins)
Fix Wordfence Error: “The signature on the request to start a scan is invalid”
Fix WooCommerce “There are no shipping options available”
Fix Contact Form 7: “There was an error trying to send your message. Please try again later.”
Fix: Elementor “The Content Area Was Not Found in Your Page”
Fix “SMTP Error: Could not authenticate.” in WP Mail SMTP
The Events Calendar Error: “count(): Argument #1 must be of type Countable|array, int given” (Tribe/Error.php:159)
How to Fix – Rank Math Fatal: “Missing format specifier at end of string”
MailPoet Fatal: Class “DOMDocument” not found – How to Fix (PHP‑XML/DOM)
WP‑Optimize Fatal: implode() Argument #1 must be of type array – How to Fix
Fix “Invalid nonce” / “Nonce verification failed” in WordPress
Fix “No route was found matching the URL and request method” in the WordPress REST API
Yoast SEO: “Error parsing the response to JSON” – How to Fix It
SEOPress FAQ v2 Error: “Block contains unexpected or invalid content”
Fix “Not specified what to flush” in WP‑CLI (W3 Total Cache)
Jetpack Asset CDN PHP 8.x Fatal (photon-cdn.php:298): Fix & Workarounds
WordPress Emergency Support & Maintenance Plans
Add Strict Security Headers to Your WordPress Site
How to Fix React Not Defined Error in MapPress Plugin
Make a Sticky Header or Sidebar with CSS
How to Restore WP-Admin After Duplicator Clone
How to Auto-Fill a Gravity Forms Hidden Field from URL
How to Solve the Cannot Acquire Reference to $GLOBALS Error
Fix WordPress redirect loop (.htaccess)
How to Fix Full Database Causing WordPress Connection Error
Guide to Building High Converting Landing Pages in Gutenberg
Configure WooCommerce shipping zones & rates
How to Set Up Google Authenticator 2FA on WordPress
Setting Up WooCommerce for Digital Downloads
How to improve WordPress Core Web Vitals scores
Push WordPress Staging to Live – free, host, & manual
How to Control the WordPress Heartbeat API for Better Performance
Steps to Cut WordPress TTFB and Speed Up Your Site
How to Prioritize WordPress Site Prep for High Traffic
Disable XML-RPC in WordPress to Stop Brute-Force Attacks
Restrict wp-admin and wp-login by IP in .htaccess
Boilerplate Code for a Basic WordPress Theme
How Plugin Count Affects WordPress Site Speed
Enable WordPress FSE (Full Site Editing), step‑by‑step
Easily Add Schema Markup to Your Gutenberg Blocks
Setting Up a WordPress Contact Form with CF7 or WPForms
How to Host Multiple WordPress Sites on Lightsail
How to Add Microsoft Clarity to WordPress with WPCode
Complete Custom WordPress Plugin Boilerplate Guide
How to Resolve Intermittent Cache Clearing Error on WP Engine
Best Fonts for Your WooCommerce Store
Create a WordPress AJAX CRUD Plugin with PHP & JS
Choose the Best WordPress Sitemap Plugin for XML & HTML
Choosing Between WordPress.org and WordPress.com
How to practice WordPress without hosting – browser, local, sandbox
When You Need a WordPress CMS (And When You Don’t)
Understanding Self-Hosted WordPress vs WordPress.com
WordPress get_posts() – Syntax & Examples
Open‑Source WCMS: WordPress vs Joomla vs Drupal
How to Fix WordPress 404 File Not Found Error
WordPress site not showing on Google – quick indexing checklist
Comparing Yoast, Rank Math & AIOSEO Plugins
How to Redirect an Old WordPress URL to a New One
Comparing Egress Bandwidth Costs Among WordPress Hosts

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