Redshift: Failed to connect

Hello, I'm trying to connect to my Redshift Serveless, but I get the following error:

I'm using the serverless endpoint, my admin credentials (password has been generated by AWS) and the default port and database name. If I try to ping the IP the error returns to me it doesn't answer.

Actually "Publicly accessible" option is enabled (on). If I try to turn it off, the error I get is the same, but the IP shown changes.

The IAM role I'm using is the autogenerated one to grant access to Redshift Serverless and every S3 bucket.

I have also set all IPv4 accessible inbound and outbound rules of the VPC security group. Nothing has changed.

Do you have any idea about what is the problem here?

I don't even understand where this IP shown by the error comes from.

EDIT:

Following the suggested documentation I got this type of configuration for my serverless workgroup.

Is there something wrong? I still get the same error.

UPDATE:

I have used the Amazon Redshift ODBC Driver (x64) to create a connection following the documentation, but I get a timeout connection error. I still believe the problem is in my network configuration.