Hey there, let's tackle this Contact Form 7 submission issue you're facing after your WordPress e-commerce site update—super frustrating when forms break post-update, I get it. Here's a step-by-step troubleshooting plan to get things back on track:

The stuck loading state almost always points to a JS error blocking the submission process. Here's how to check:

• Open your browser's DevTools (hit F12 or Ctrl+Shift+I), switch to the Console tab. Try submitting the form again and watch for red error messages. Common issues include Uncaught TypeError from conflicting scripts (e.g., your e-commerce plugin's JS clashing with CF7's core scripts).
• If you see errors tied to CF7 files, reload the page with cache disabled (hold Shift while clicking refresh) to rule out outdated cached JS files.

Sometimes updates can reset or break form settings without you noticing:

• Double-check the Mail tab: Ensure the "To" email is a valid address (avoid disposable domains), and the "From" address matches your site's domain (many servers block emails sent from external domains via PHP mail).
• Test the Mail (2) (auto-reply) tab too—even a small misconfiguration here can halt the entire submission flow.
• Head to Contact > Integration and confirm reCAPTCHA (if enabled) is properly connected. A broken reCAPTCHA integration often causes stuck submissions with no clear feedback.

Cached files are a frequent culprit after site updates:

• Clear your WordPress cache (if using plugins like WP Rocket, W3 Total Cache, or your hosting's built-in cache). Form scripts and endpoints are often cached, and updates can leave outdated files that conflict.
• Test the form in an incognito window or clear your browser's cache/cookies to eliminate local caching issues.

This is the most reliable way to pinpoint the issue:

• Plugin test: Deactivate all plugins except Contact Form 7 and your core e-commerce plugin (e.g., WooCommerce). Try submitting the form—if it works, reactivate plugins one by one, testing after each, to find the conflicting plugin.
• Theme test: If the issue persists, switch to a default WordPress theme like Twenty Twenty-Four. If the form starts working, your custom theme has a conflict (likely in its functions.php file or custom JS that interferes with CF7's scripts).

Sometimes the problem isn't with your site, but the server:

• Ask your hosting provider if there were recent server updates (like PHP version changes). CF7 requires PHP 7.4+—a rollback to an older version can break functionality.
• Check your server's error logs (usually in cPanel or your hosting dashboard) for PHP fatal errors related to CF7. Common issues include low memory limits or mod_security rules blocking form submissions.
• Verify that the file wp-content/plugins/contact-form-7/includes/js/scripts.js exists and has correct permissions—updates can sometimes corrupt file permissions or leave files missing.

For forms that don't react at all when clicking submit:

• Check the form's HTML markup: Ensure it has a valid action attribute (should point to the page itself or CF7's handler endpoint).
• Run your page through the W3C HTML Validator—unclosed tags or invalid HTML can break form functionality entirely.
• If you're using custom form handling (not CF7), confirm the PHP processing script hasn't been overwritten or deleted during the site update.

Quick Fixes for Common Scenarios #

• JS conflict: Use a plugin like Script Organizer to defer or load conflicting scripts only where needed, or reach out to the plugin/theme developer for a compatibility update.
• Broken reCAPTCHA: Re-generate your reCAPTCHA keys in Google's admin panel and re-enter them in CF7's Integration settings.
• Mod_security block: Ask your host to whitelist the CF7 submission endpoint: /wp-json/contact-form-7/v1/contact-forms/{form-id}/feedback

Hope this gets your forms working again quickly—let me know if you hit a specific snag and need more details!

内容的提问来源于stack exchange，提问作者Bhupendra Rathore