The error you're encountering is due to a conflict or issue within the Elementor and Elementor Pro plugins, specifically related to the widgetType array and the handling of element child types. Here's how you can resolve it step by step:

Step 1: Backup Your Website Step 2: Troubleshooting Steps

• Check PHP Version
• Update Plugins
• Switch to Default Theme
• Regenerate Elementor CSS Files
• Debug the "widgetType" Issue
• Fix the Fatal Error
• Disable Nested Carousel Widget
• Check for Plugin Conflicts

Step 3: Enable Debug Mode Step 4: Reinstall Elementor Plugins Step 5: Contact Elementor Support