Adds robust error handling and user feedback for menu.yml and shops.yml loading, including detailed logging for misconfigurations. Introduces new worth.yml options to blacklist inventory titles and restrict worth display to player inventory only. Improves command execution error handling, adds a configurable error message, and enhances placeholder replacement to support both %placeholder% and {placeholder} formats. Updates ProtocolLib worth display logic to respect new config options and avoid showing worth in blacklisted or GUIShop inventories. Bumps version to 9.3.0.