WordPress Theme Plugin Fix Needed-has bugs

I'm having significant issues with a core plugin that came with my WordPress theme. I can't import the full demo and the plugin is causing critical errors that are affecting the booking functionality on the website.

Key Issues:
- Critical errors stemming from the plugin
- Inability to import the full website demo
- Booking functionality problems linked to the plugin

I haven’t made any custom modifications to the plugin, so the issues must stem from the plugin itself.

Skills and Experience:
- Strong proficiency in WordPress and PHP
- Experience troubleshooting and fixing WordPress plugins
- Understanding of WordPress theme integration
- Experience with debugging critical errors
- Familiarity with booking systems on WordPress

I’m looking for a professional who can swiftly address these issues, restore the functionality of my site, and enable me to import the demo content.