xampp 出現(xiàn)問題 Host is not allowed to connect to this MariaDB server

請問一下 我用 http://localhost/ 訪問出現(xiàn)錯誤：

Host is not allowed to connect to this MariaDB server

突然變這樣，我不知道為何！
是哪裡有問題？
我也用xampp重新啟動mysql了還是一樣！
我發(fā)現(xiàn)是遠程連線的問題

因為我連接數(shù)據(jù)庫是用server IP （linode）
我做了以下的指令

MariaDB [mysql]> GRANT ALL PRIVILEGES ON *.* TO 'root'@'xxx.xxx.xx.xx' IDENTIFIED BY 'xxx' WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec)

xxx.xxx.xx.xx 是我那臺server 的ＩＰ
只是我接下來要打

MariaDB [mysql]> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'xxx' WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec)

我從localhost還是沒辦法讀取到數(shù)據(jù)
Host is not allowed to connect to this MariaDB server