$wpdb->get_results($wpdb->prepare(… You have an error in your SQL syntax;

PHP views backticks (ie, “) as delimiting something that should be executed, not as a quotation character. Use single quotes (') instead.

$users = $wpdb->get_results($wpdb->prepare('SELECT * FROM %s', 'tc_chat_clt'));

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)