If you’re encountering a fatal error while saving permalinks in a new subdomain added to a WordPress multisite network, fear not – you’re not alone. The error you’ve described is a common issue that often stems from misconfigurations or conflicts within the WordPress core files.
The error message you provided indicates an undefined constant “SECURE_AUTH_COOKIE” in the file “/wp-includes/pluggable.php,” causing the fatal error. This error can disrupt the process of saving permalinks and may be attributed to various factors.
As a beginner, addressing this issue might seem daunting, but we’ll guide you through a step-by-step resolution.
Step 1: Identify the Root Cause
Before delving into fixes, let’s understand the possible causes. This error often arises due to conflicts with plugins or themes, improper installation, or missing files. In your case, it seems related to the “leco-client-portal” plugin.
Step 2: Deactivate the Problematic Plugin
As the error points to the “leco-client-portal” plugin, start by deactivating it. Access your WordPress installation directory via FTP or the hosting file manager. Navigate to “/wp-content/plugins/” and rename the “leco-client-portal” folder to something else.
Try saving permalinks again. If successful, the issue lies with the plugin. Consider updating it or seeking support from the plugin developer.
Step 3: Check Theme Compatibility
Switch to a default WordPress theme like Twenty Twenty-One temporarily. If the error persists, there might be a theme-related issue. Ensure your theme is multisite compatible and up-to-date.
Step 4: Verify WordPress Core Files
Download a fresh copy of WordPress from the official website. Replace the “/wp-includes/” and “/wp-admin/” directories on your server with the corresponding directories from the downloaded WordPress files. This ensures that your core files are intact and not corrupted.
Step 5: Review DNS Settings
Confirm that your DNS settings for the new subdomain are accurate. Incorrect DNS configurations can lead to unexpected errors.
Step 6: Revisit Permissions
Although GoDaddy helped with permissions initially, verify that the permissions for the new site are correctly set. Incorrect permissions can cause various issues, including the one you’re facing.
Step 7: Seek Professional Assistance
If the problem persists, and you’re unsure of the next steps, consider seeking professional help. Consult with your hosting provider or hire a WordPress developer to investigate and resolve the issue.
By following these steps, you should be able to address the fatal error and successfully save permalinks on your WordPress multisite network.