A problem in transferring the site from one server to another

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  mohsen3331 · عضو · جويلية 25, 2020 at 10:54 م

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  Please I need your help to solve this problem
  When I transfer my site everything was fine
  But I had a problem when I adding a page, article, list, etc.

  I always see this message :

  This site can’t be reachedThe webpage at https://clamantinah.com/wp-admin/post.php?post=20&action=edit might be temporarily down or it may have moved permanently to a new web address.
  ERR_HTTP2_PROTOCOL_ERROR