Hi,
The error state that Path of the new AD User is empty.
The Path in the New-ADUser Cmdlet is the Path of the OU where the user wil be created.
I quickly check the code of ANUC.
When you use submit button it uses the Combo Box OU (on the left, under Current Domain).
In your case : "OU=Grade 12,DC=Libertylab2,DC=local"
When you use Submit All button, it uses the row Path from the CSV (line 549).
As there is no Path information in your CSV, the cmdlet New-ADUser doesn't run.
Path attributes isn't required in New-ADUser Cmdlet but when you use it, you have to provide a value.
So if you wanna use Submit All you have to modify your CSV file and provide the OU path.
Regards,