Web Request error / approve user request

[Nbibi]

Hi All, 

I have a Nintex Form with (Web Request) which is working fine when detail is selected by the user and submitted on forms.

I Only get an error come up when the user doesn't select anything from the list and keep it empty (Multi Selected items) and submitted the form. I get an error like (an error has occurred in Create User) and give me this link - https://docs.microsoft.com/en-us/sharepoint/dev/general-development/common-error-messages-in-sharepo...

I have no idea how to make it work please any help welcome.

[SimonMuntz]

Hi,
If the control requires an entry then make it a required field.
This will avoid the error as it will always be populated.