It seems like the Facebook crawler is still caching the old meta tags. You can try the following solutions:
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Use the Facebook Sharing Debugger to scrape the new meta tags manually. Go to the debugger tool, enter the URL of the page you want to scrape, and click "Scrape Again". This should update the cached meta tags.
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Add a timestamp or a random string to the end of the URL to force Facebook to fetch the page again. For example, change the URL from
https://escuela-ray-bolivar-sosa.com/student/todo_concursotohttps://escuela-ray-bolivar-sosa.com/student/todo_concurso?timestamp=123456. This should make Facebook think that it's a new page and fetch the new meta tags. -
Check if there are any other meta tags on the page that might be conflicting with the new ones. For example, if there is a
<meta property="og:title">tag with a different value, Facebook might be using that instead of the new one. Make sure there are no conflicting meta tags on the page. -
Wait for some time and try again. Sometimes it takes a while for Facebook to update its cache.
