Error while running Server 2016 Power Shell command

I am trying to follow the instructions within the the https://social.technet.microsoft.com/wiki/contents/articles/24541.powershell-bulk-create-ad-users-from-csv-file.aspx#Code_Used webpage to import username information from a .CSV file to create usernames within Server 2016 Active Directory but every time I try to do this I receive the following error messages:

When I run the following command within PowerShell (running as an administrator) .\un.ps1 I get the error message

 “ConvertTo-SecureString : Cannot bind argument to parameter 'String' because it is null.
At C:\Support\UN\UN.ps1:12 char:232
+ ... scription" -AccountPassword (ConvertTo-SecureString $Password -AsPlai ...
+                                                         ~~~~~~~~~
    + CategoryInfo          : InvalidData: (:) [ConvertTo-SecureString], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.ConvertToSecureStringCommand

ConvertTo-SecureString : Cannot bind argument to parameter 'String' because it is null.
At C:\Support\UN\UN.ps1:12 char:232
+ ... scription" -AccountPassword (ConvertTo-SecureString $Password -AsPlai ...
+                                                         ~~~~~~~~~
    + CategoryInfo          : InvalidData: (:) [ConvertTo-SecureString], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.ConvertToSecureStringCommand” which displays for every username that I attempt to create (see the screenshot).

I have included the CSV spreadsheet I am using with this command.

What needs to be done to fix this so I will be able to successfully import the information to create these usernames within Server 2016 Active Directory?

Here is a screenshot of these error messages:

I receive these errors when running the .\un.ps1  command from an elevated PowerShell

Here is a screenshot of the CSV file:


UN.csv

In this case the CSV file is saved in the "File format is CSV UTF-8 Comma delimited" format. Is this the correct format to save the file in?


The context of the UN.ps1 PowerShell command is:

$Users = Import-Csv -Path "C:\support\un\CompanyUN.csv"            
foreach ($User in $Users)            
{            
    $Displayname = $User.Firstname + " " + $User.Lastname            
    $UserFirstname = $User.Firstname            
    $UserLastname = $User.Lastname            
    $OU = "$User.OU"            
    $SAM = $User.SAM            
    $UPN = $User.Firstname + "." + $User.Lastname + "@" + $User.Maildomain            
    $Description = $User.Description            
    $Password = $User.Password            
    New-ADUser -Name "$Displayname" -DisplayName "$Displayname" -SamAccountName $SAM -UserPrincipalName $UPN -GivenName "$UserFirstname" -Surname "$UserLastname" -Description "$Description" -AccountPassword (ConvertTo-SecureString $Password -AsPlainText -Force) -Enabled $true -Path "$OU" -ChangePasswordAtLogon $false –PasswordNeverExpires $true -server domain.loc            
}

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What needs to be done to fix this so I will be able to successfully import & create these Server 2016 Active Directory users using this power shell command and the CSV file?

Please let me know if any further information is needed.