SQLSTATE[HY000] [1130] Host is not allowed to connect to this MySQL server code example

Example 1: host 127.0 0.1 is not allowed to connect to this mysql server

UPDATE mysql.user SET host='%' WHERE user='root';

Example 2: host is not allowed to connect to this mysql server

CREATE USER 'username'@'localhost' IDENTIFIED BY 'password';

GRANT ALL PRIVILEGES ON *.* TO 'username'@'localhost' WITH GRANT OPTION;

CREATE USER 'username'@'%' IDENTIFIED BY 'password';

GRANT ALL PRIVILEGES ON *.* TO 'username'@'%' WITH GRANT OPTION;

FLUSH PRIVILEGES;