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Why WP Fastest Cache Settings Won't Save: Common Causes and Solutions

19 threads Sep 7, 2025 Plugin → Wp fastest cache

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Many WordPress users encounter a frustrating issue where their changes in the WP Fastest Cache settings panel refuse to save. You check the boxes you need, click the "Submit" button, and after the page reloads, all your selections are unchecked and your configuration is lost. This guide will walk you through the most common reasons for this problem and how to resolve them.

Why This Happens

Based on extensive community reports, this behavior is almost always a symptom of an underlying conflict. The plugin is often prevented from writing its configuration to the database due to interference from another process. This is a security and stability feature, not a bug in the plugin itself. The most frequent culprits are other caching layers or specific plugins that handle site content in a conflicting way.

Common Solutions

1. Check for a Conflicting Plugin

The most common cause, as seen in numerous support threads, is a conflict with the "Cookie Notice & Compliance for GDPR / CCPA" plugin. Users have consistently reported that deactivating this specific plugin immediately resolves the issue, allowing WP Fastest Cache settings to save correctly.

How to test:

  1. Navigate to your WordPress dashboard.
  2. Go to Plugins → Installed Plugins.
  3. Temporarily deactivate the "Cookie Notice & Compliance for GDPR / CCPA" plugin.
  4. Return to your WP Fastest Cache settings and try to save your configuration again.

If this works, you will need to find an alternative cookie consent solution. The community has suggested alternatives like GDPR Cookie Compliance.

2. Disable Server-Side or Object Caching

Another prevalent cause is a conflict with server-level caching or database (object) caching tools. These include:

  • Redis object caching.
  • Hosting provider cache systems (e.g., Sucuri, Cloudflare, or a proprietary host cache).
  • Other database caching plugins like WP-Optimize.

How to test:

  1. If you have a Redis or Memcached object cache running, try disabling it temporarily through your hosting control panel or by renaming its object-dropin file (object-cache.php) in your wp-content folder.
  2. Contact your hosting provider to ask if they are running a server-side cache and request that it be temporarily disabled for testing.
  3. Deactivate any other caching or optimization plugins that might be running concurrently.

3. Look for a Hidden Warning Message

In some cases, the plugin may be displaying a PHP warning or error that is not immediately visible on the page. This warning can interrupt the saving process.

How to test:

  1. Carefully scroll to the very top and very bottom of your WordPress admin page.
  2. Check for any small, faintly colored text that might indicate a PHP warning, notice, or error.
  3. If you find one, it will often point directly to the source of the conflict.

Systematic Troubleshooting

If the solutions above don't work, you need to perform a conflict test to identify the exact cause.

  1. Theme Test: Temporarily switch to a default WordPress theme like Twenty Twenty-Four. Try to save the WP Fastest Cache settings. If it works, the issue is with your theme.
  2. Plugin Test: Deactivate all your plugins except WP Fastest Cache. If the settings save, reactivate your plugins one by one, testing after each activation, until the problem returns. The last plugin you activated is the culprit.

What to Do If You Can't Access Your Dashboard

In severe cases, a caching conflict can cause a white screen or prevent you from accessing your admin dashboard entirely.

Solution:

  1. Access your website's files via FTP or your hosting provider's file manager.
  2. Navigate to the /wp-content/plugins/ directory.
  3. Rename the wp-fastest-cache folder to something like wp-fastest-cache_OFF.
  4. This will deactivate the plugin and should restore access to your dashboard, allowing you to continue troubleshooting.

By methodically working through these common causes, most users are able to identify and resolve the issue preventing their WP Fastest Cache settings from saving.

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