WooCommerce Notification Has Empty Placeholders

If you are experiencing issues where WooCommerce notifications contain empty placeholders (e.g., {{order_id}}, {{billing_first_name}} appearing blank), enabling High-Performance Order Storage (HPOS) may help resolve the issue.

Ensure you are running WooCommerce 7.1+, as HPOS is available in newer versions.

Steps to Enable HPOS:

1. Navigate to WooCommerce > Settings > Advanced > Features
2. Tick the High-Performance Order Storage (HPOS).
3. Click Save changes.

Place a test order to make sure the placeholders in your notifications are now filled in correctly.