New Post: AutoSPinstaller halts on creating initial Portal

New-SPWebApplication : The pipeline has been stopped.
At D:\SP\AutoSPInstaller\AutoSPInstallerFunctions.ps1:2524 char:29
+         New-SPWebApplication <<<<  -Name $webAppName -ApplicationPool $appPoo
l -DatabaseServer $dbServer -DatabaseName $database -Url $url -Port $port -Secu
reSocketsLayer:$useSSL @hostHeaderSwitch @appPoolAccountSwitch @authProviderSwi
tch @pathSwitch | Out-Null
    + CategoryInfo          : InvalidData: (Microsoft.Share...PWebApplication:
   SPCmdletNewSPWebApplication) [New-SPWebApplication], PipelineStoppedExcept
  ion
    + FullyQualifiedErrorId : Microsoft.SharePoint.PowerShell.SPCmdletNewSPWeb
   Application

--------------------------------------------------------------
 - Script halted!


Exception             : Microsoft.SharePoint.PowerShell.SPCmdletException: Appl
                        icationPoolAccount is not found.
                           at System.Management.Automation.MshCommandRuntime.Th
                        rowTerminatingError(ErrorRecord errorRecord)
TargetObject          : Microsoft.SharePoint.PowerShell.SPCmdletNewSPWebApplica
                        tion
CategoryInfo          : InvalidArgument: (Microsoft.Share...PWebApplication:SPC
                        mdletNewSPWebApplication) [New-SPWebApplication], SPCmd
                        letException
FullyQualifiedErrorId : Microsoft.SharePoint.PowerShell.SPCmdletNewSPWebApplica
                        tion
ErrorDetails          :
InvocationInfo        : System.Management.Automation.InvocationInfo
PipelineIterationInfo : {0, 1, 0}