Ontap Select- ESXi host not discovered while creating cluster

Hi All,

I have deployed the Ontap Select 9.3 in our setup. assigned the IP details to ontap select. I can able to access the ontap select administrator console from web client. As I added the ESXi hypervisor host without vcenter. SO I create the new cluster, enter the cluster details and next step needs to select the ESXi host but there is no ESXi host discovered. So kindly help me to deploy the ontap select. For your information find the below ontap select and ESXi details, also find the attached screenshot.

Ontap Select - 9.3
ESXi version - 6.5
Vcenter server - NA

Regards,

Manikandan S