I have Issus with database when upload my plugin on server

I’m newbie in WordPress plugin developer field, I Create a multi step form builder with new option like tracking code anyway every things in local is work well but when I install the plugin in WordPress on server I got below error for all table:
[Table 'XXXX.wp_emsfb_msg_' doesn't exist]

Please notice:
1- All table added to database correctly.
2- I use prefix table name with this method $this->db->prefix . "emsfb_msg_".
3- I call database in class in this way :

public function __construct(){
 global $wpdb;
$this->db = $wpdb; .... }

and use $this->db private variable when I need get query from database in a class.
4- source of plugin is below if it can help.

I’m looking for solution for 2 weeks and search every thing I think it could help but I can’t solve this problem . any Idea could help thanks.

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