Error button facebook

Hello!
Can someone please help me?
I’m a beginner and i want to put a like button in my site.
Without it, the HTML Validator show me that the site has no errors.
When i put the code for facebook, it shows me 5-6 errors.
This is with errors: [url]http://www.hoteluri-in-bulgaria.ro/vila_maria_varna.html[/url]
This is with no errors:[url]http://www.hoteluri-in-bulgaria.ro/complex_hotel_arcadia_sunny_beach.html[/url]
Thank you!

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