Fatal Error: Call to undefined function get_current_site() in Seraphinite Accele

Hello,

I’m encountering a critical fatal error when using the Seraphinite Accelerator plugin. The plugin causes the site to crash with the following error:

Fatal error: Uncaught Error: Call to undefined function get_current_site()
in /wp-content/plugins/seraphinite-accelerator/cache_obj.php:189

Issue:
After enabling Object Cache in Seraphinite Accelerator, the site crashes with:
Fatal error: Uncaught Error: Call to undefined function get_current_site()

Root Cause:
The plugin’s WP_Object_Cache class assumes a Multisite environment and calls get_current_site() (a Multisite-only function) without checking is_multisite() or function_exists().

Affected Code:
In cache_obj.php, the _init() method tries to initialize $this->curSite using get_current_site(), which fails on single-site WordPress.

This error occurs because the plugin’s WP_Object_Cache->_init() method calls get_current_site() too early — before WordPress has fully initialized the multisite environment.🔧 Steps to Reproduce:

1. Install and activate the Seraphinite Accelerator plugin.
2. Access any page on the site (including admin dashboard).
3. The error appears immediately.

🖥️ Environment:

• WordPress Version: [Insert version – e.g., 6.5]
• PHP Version: [e.g., 8.1]
• Multisite: Yes (subdirectory install)
• Plugin: Seraphinite Accelerator v[insert version if available]

📁 File Involved:

/wp-content/plugins/seraphinite-accelerator/cache_obj.php, line 189:

$this -> curSite = get_current_site();✅ Suggested Fix:

The _init() method should check whether get_current_site() is available before calling it. Alternatively, delay initialization until after WordPress has fully loaded by using the plugins_loaded hook.

Example patch idea:

if (!function_exists('get_current_site')) {

$this->inited = false;

add_action('plugins_loaded', array($this, '_init'), 20);

return;

}

Please provide an updated version of the plugin that resolves this critical bug.

Thank you.If Submitting to ww.wp.xz.cn Support Forum:

Use this variation:❗️Plugin Causes Fatal Error: Call to undefined function get_current_site()

I’m getting the following fatal error when trying to use the Seraphinite Accelerator plugin:

Fatal error: Uncaught Error: Call to undefined function get_current_site()

in /wp-content/plugins/seraphinite-accelerator/cache_obj.php

This crashes the entire website. I believe the issue happens because the plugin attempts to call get_current_site() during its initialization too early in the WordPress loading process.My Setup:

• WordPress: 6.8.1 
• PHP: 8.1
• Multisite: Enabled (subdomain)

The file cache_obj.php tries to access get_current_site() inside the _init() method, which runs before WordPress has defined that function.Proposed Fix:

Delay initialization until plugins_loaded or wrap the call with a function-exists check.

Can anyone confirm this is a known bug? Or is there a working updated version of this plugin?

Thanks.