I have created site design with two site scripts. applied using below command
$Sitedesignout1=Add-SPOSiteDesign -Title "Site Design 2" -WebTemplate "68" -SiteScripts $result1.Id,$result2.Id -Description "Site Desin Sample"
But after try to apply Site design using below code throwing an Operation is not valid due to the current state of the object error
$adminSiteUrl = "https://myadmin-admin.sharepoint.com"
$siteUrl = "https:// myadmin.sharepoint.com/sites/PracticeSiteDesign"
$siteDesignId = "04d0e647-5912-4ef7-8069-9186cebb2192"
Connect-SPOService $adminSiteUrl
$task = Add-SPOSiteDesignTask -SiteDesignId $siteDesignId -WebUrl $siteUrl
Add-SPOSiteDesignTask : Operation is not valid due to the current state of the object.
At line:6 char:9
+ $task = Add-SPOSiteDesignTask -SiteDesignId $siteDesignId -WebUrl $si ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Add-SPOSiteDesignTask], ServerException
+ FullyQualifiedErrorId : Microsoft.SharePoint.Client.ServerException,Microsoft.Online.SharePoint.PowerShell.AddSPOSiteDesignTask
