Title: Only pulsating logo?
Last modified: September 8, 2026

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# Only pulsating logo?

 *  [Rolf Allard van Hagen](https://wordpress.org/support/users/ravanh/)
 * (@ravanh)
 * [1 week, 2 days ago](https://wordpress.org/support/topic/only-pulsating-logo/)
 * Hi, after installing and activating the plugin on a multisite, I go to Jetbackup
   in the network admin. I only see a pulsating Jetbackup logo but nothing else 
   happens. All the submenu pages show the same.
 * Browser console shows this error (many times):
 *     ```wp-block-code
       main.js?ver=7.1:180Uncaught Error: Failed loading panel preload information. Error: Error %s - Session Expired (Refresh Page Needed?)
       ```
   
 * Am I missing something?

Viewing 1 replies (of 1 total)

 *  Plugin Support [JetApps Anton](https://wordpress.org/support/users/abagasaojet/)
 * (@abagasaojet)
 * [1 week, 2 days ago](https://wordpress.org/support/topic/only-pulsating-logo/#post-19014848)
 * Hi Rolf (@ravanh),
 * Thank you for reaching out.
 * The error `Failed loading panel preload information. Error: Error %s - Session
   Expired (Refresh Page Needed?)` occurs when JetBackup’s backend AJAX requests
   fail WordPress security nonce verification. This means the security token used
   to validate requests between your browser and the WordPress REST/AJAX endpoint
   is failing validation or is not being accepted.
 * If refreshing the page does not resolve the issue, common root causes include:
    - **Page or Server Caching:** Page caching, object caching, or host/CDN cache
      layer configurations serving cached or stale nonce tokens to the frontend.
    - **Domain or Cookie Mismatches:** Mismatched site URLs, HTTP vs. HTTPS protocol
      differences, or custom cookie domain configurations—which are especially prevalent
      in WordPress Multisite network setups.
    - **Security or Firewall Interference:** Security plugins, host-level web application
      firewalls (WAF), or server rules stripping custom headers or blocking internal
      AJAX callbacks.
 * Because refreshing the page does not clear this error in your setup, we will 
   need to access your installation directly to inspect the Network Admin AJAX requests
   and debug the root cause.
 * Please open a ticket through the [JetBackup Support Portal](https://billing.jetbackup.com/contact.php)
   and include a link to this forum thread so our technical team can investigate
   further.
   Best Regards,Anton B.JetBackup Team

Viewing 1 replies (of 1 total)

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 * 1 reply
 * 2 participants
 * Last reply from: [JetApps Anton](https://wordpress.org/support/users/abagasaojet/)
 * Last activity: [1 week, 2 days ago](https://wordpress.org/support/topic/only-pulsating-logo/#post-19014848)
 * Status: not resolved