How to fix errors when migrating a WordPress site to another hosting

It seems like you're encountering a common issue after migrating a WordPress website to a new hosting provider. The issue you're describing could be due to a variety of reasons. Here are some steps you can take to troubleshoot and resolve the issue:

1. Permalink Settings: Since you mentioned that changing the permalinks causes a 404 error, there might be an issue with your `.htaccess` file, which controls how WordPress handles URLs. To reset the permalink settings, follow these steps:

??- Connect to your website via FTP or the hosting file manager.

??- Locate the `.htaccess` file in your website's root directory.

??- Rename the file (e.g., to `.htaccess_backup`).

??- In the WordPress admin panel, go to Settings > Permalinks.

??- Without making any changes, click the "Save Changes" button. This will regenerate the `.htaccess` file.

2. File Permissions: Ensure that the file permissions are set correctly for your WordPress files and directories. The typical permission settings are 755 for directories and 644 for files. Incorrect permissions can lead to access issues.

3. Database URL: Verify that the URLs in the WordPress database are updated correctly to match the new domain. You can use a plugin like "Better Search Replace" to search for and replace old URLs with the new ones.

4. .htaccess File: If the `.htaccess` file is not being generated properly, you might need to manually create or modify it. Here's a common structure for a WordPress `.htaccess` file:

??```

# BEGIN WordPres

??<IfModule mod_rewrite.c>

??RewriteEngine On

??RewriteBase /

??RewriteRule ^index\.php$ - [L]

??RewriteCond %{REQUEST_FILENAME} !-f

??RewriteCond %{REQUEST_FILENAME} !-d

??RewriteRule . /index.php [L]

??</IfModule>

??# END WordPresss        

??```

5. Plugins and Themes: Sometimes, incompatible or corrupted plugins or themes can cause 404 errors. Try disabling all plugins by renaming the `plugins` directory inside `wp-content` to something else. If the issue is resolved, you can then re-enable plugins one by one to identify the problematic one.

6. Debugging Mode: If you're unable to access the administration interface due to the 404 error, you can enable WordPress's debugging mode to see if any error messages are being generated. In your `wp-config.php` file, add the following lines:

??```

define('WP_DEBUG', true)

??define('WP_DEBUG_LOG', true);;        

??```

??This will create a log file (`wp-content/debug.log`) where you can check for error messages.

7. Server Configuration: Check with your hosting provider to ensure that your server's configuration is compatible with WordPress. Some hosting providers have specific requirements or settings that need to be configured correctly.

8. Rewrite Module: Ensure that the Apache rewrite module is enabled on your server. This is necessary for WordPress's pretty permalinks to work.

9. Cache: Clear any caching plugins or server-side caching that might be causing conflicts.

10. Contact Hostinger Support: If none of the above steps resolve the issue, reach out to Hostinger's support team. They should be able to assist you with server-specific configuration issues.

Remember to back up your website files and database before making any significant changes. This will allow you to restore your site if anything goes wrong during the troubleshooting process.

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