DataSource.Error: MySQL: Host is blocked because of many connection errors

[Hike_N]

I'm trying to connect to Power BI and receiving the following error.

DataSource.Error: MySQL: Host 'xxx.xx.xxx.xx' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'
Details:
    DataSourceKind=MySql
    DataSourcePath=prod-replication.************.eu-west-1.rds.amazonaws.com;***********
    Message=Host 'xxx.xx.xxx.xx' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'
    ErrorCode=-2147467259

I'm using amazon rds. I did flush my hosts and even rebooted the rds instance.

What else can I do to fix the problem?