Getting below error while creating Kafka configuration Data instance and Pega version is 8.4.1

"Error connecting to Kafka. Failed to construct kafka consumer. No resolvable bootstrap urls given in bootstrap.servers"

Steps to Reproduce the error:

1 Click AddHost and provide BootstrapServer Name and Port number 

2 and Save the Instance without Security Settings and JASS config 

Thanks,

Kavileswar