AzTS setup fails when run with flag [-EnableWAF] `

[RahulJathar]

The setup command

$DeploymentResult = Install-AzSKTenantSecuritySolution -SubscriptionId <HostSubscriptionId>
-ScanHostRGName -Location <ResourceLocation>
-ScanIdentityId [-WebAPIAzureADAppId <WebAPIAzureADApplicationId>]
[-UIAzureADAppId ] [-AzureEnvironmentName AzureCloud]
[-ScanIdentityHasGraphPermission:$true] -SendAlertNotificationToEmailIds @('<EmailId1>', '<EmailId2>', '<EmailId3>')
[-EnableAutoUpdater] [-EnableAzTSUI]
[-EnableVnetIntegration] [-EnableWAF]
-Verbose

fails when run with flag [-EnableWAF] but works fine without it. I get below error message when run with this flag