Unable to connect to to "Session Desktop", after following official guide

Hi guys,

I'm testing out Windows Virtual Desktop (WVD) for my company to set up a call center. Following the tutorial on https://docs.microsoft.com/en-us/azure/virtual-desktop , I'm getting stuck at the final step to connect to the Hostpool using the web client https://rdweb.wvd.microsoft.com

There were no errors throughout the tutorial.

I'm getting the following error on the browser :

Oops, we couldn't connect to "Session Desktop"
We couldn't connect to the gateway because of an error. If this keeps happening, ask your admin or tech support for help.

Following some diagnostic advice, I'm also getting the below error on PowerShell for Get-RdsSessionHost :
PS C:\Windows\system32> Get-RdsSessionHost -TenantName "KLSALESWVD" -HostPoolName "KLSalesWVD"
Get-RdsSessionHost : HostPoolName: 'KLSalesWVD' does not exist. Please use powershell command: New-RdsHostPool
ActivityId: b1955365-8a98-4146-a1a3-a7c7e7c6bcfa
Powershell commands to diagnose the failure:
Get-RdsDiagnosticActivities -ActivityId b1955365-8a98-4146-a1a3-a7c7e7c6bcfa
At line:1 char:1
+ Get-RdsSessionHost -TenantName "KLSALESWVD" -HostPoolName "KLSalesWVD ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : FromStdErr: (Microsoft.RDInf...tRdsSessionHost:GetRdsSessionHost) [Get-RdsSessionHost],
RdsPowerShellException
+ FullyQualifiedErrorId : HostPoolNotFound,Microsoft.RDInfra.RDPowershell.SessionHost.GetRdsSessionHost

Can someone point me in the right direction?

Thanks!!