I’m getting an error “Cannot find VirtualNetwork with name vnet-name”. What am I doing wrong?

var subnetName = 'subnetName'
var linuxVersion = 'node|20-lts'

resource appService 'Microsoft.Web/sites@2023-12-01' = {
  name: '${webAppPrefix}${name}'
  location: location
  properties: {
    serverFarmId: webAppPlan.id
    publicNetworkAccess: 'Disabled'
    virtualNetworkSubnetId: resourceId('Microsoft.Network/virtualNetworks/subnets/', 'vnet-name' , subnetName)
    siteConfig: {
      linuxFxVersion: linuxVersion  
    }
  }
}