How to resolve NewAD error with -Path $OU - powershell

Question

I am currently trying to automate the creation of new users on my Active Directory.
However when I run my powershell here is the error that presents itself to me :
New-ADUser: Unable to validate argument on "Path" parameter. The argument is null or empty. Provide an argument that is not null or empty and try again.
At character Line: 23:19
+ -Path $ OR `
+ ~~~
+ CategoryInfo: InvalidData: (:) [New-ADUser], ParameterBindingValidationException
+ FullyQualifiedErrorId: ParameterArgumentValidationError, Microsoft.ActiveDirectory.Management.Commands.NewADUser
What can i do ?
Thanks for your help !
This is my code
$ADUsers = Import-csv E:\SCRIPT\newusers.csv
foreach ($User in $ADUsers)
{
$Username = $User.username
$Password = $User.password
$Firstname = $User.firstname
$Lastname = $User.lastname
$Description = $User.description
$OU = $User.ou
New-ADUser `
-SamAccountName $Username `
-UserPrincipalName "$Lastname#domaine.fr" `
-Name "$Firstname $Lastname" `
-GivenName $Firstname `
-Surname $Lastname `
-Enabled $True `
-ChangePasswordAtLogon $False `
-DisplayName "$Lastname, $Firstname" `
-Description $Description `
-AccountPassword $Password `
-Path $OU `
}

Answer 1

Your comment indicates the CSV file uses the ; semi-colon as delimiter character, but you neglect to add that to the Import-Csv cmdlet. Now it is trying to parse the data using the default comma , and because of that none of the fields have a correct value.
Replace the first line with
$ADUsers = Import-csv -Path 'E:\SCRIPT\newusers.csv' -Delimiter ';'
Other than that, have a look at using splatting, so you don't need those awkward backticks.