The user specified as a definer ('root'@'%') does not exist【亲测可用，服务器端】

解析：

权限问题，授权 给 root  所有sql 权限

mysql> grant all privileges on *.* to root@"%" identified by ".";
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)