WordPress Backend Error & SEO Fix

A persistent notice has started flooding my WordPress admin area:

“Deprecated: WP_Translation_Controller::load_file(): Implicitly marking parameter $locale as nullable is deprecated, the explicit nullable type must be used instead in /home/apienergy123/public_html/wp-includes/l10n/class-wp-translation-controller.php on line 101.”

I need that message eliminated properly—not hidden—with the code adjusted to comply with the latest WordPress/PHP standards. Because the warning touches the core, I’d like a full sweep of the backend to spot and fix any other outdated or risky functions while you’re in there.

While you work, please:

• Make the necessary code adjustments and tidy up related templates or hooks.
• Refresh or correct any content that’s affected by these fixes.
• Apply sensible on-page SEO tweaks (titles, meta descriptions, alt text, internal links) so the pages you touch are search-ready.

Acceptance will be simple: no deprecated notices in the dashboard or logs, the site renders normally on both front- and backend, and Lighthouse/SEO checks show the updated pages are properly tagged.

Everything runs on the live server listed above, so please be comfortable working in a production environment with standard safeguards such as backups and a staging copy if you prefer.