Dennis Friis 

Is this the first time you are faced with this problem?
Have you been able to create/assign packages to others in the past?

If you go to File - Setup - Users, please then check to see if all users in your list has an email address associated.

I have heard of cases where there is something wrong with the list of users and its prevented packages from being assigned

I hope this helps - do keep in touch

Lyds

Hi Lydia,

Thanks for getting back to me on this. 

I have encountered this issue several times and had to open the project in a previous version of Studio in order to create a project package.

I checked the user list under File – Setup – Users according to your description, and everything looked correct. However, checking again in Studio using the Create Project Package wizard, none of the users appeared in the selection list for user assignment.

But I have now tried a different approach, which solved the issue:
 I deleted all users under File – Setup – Users and created them from scratch. This little trick solved the issue, and the users are now appearing correctly in the selection list in the wizard, and I can create a project package. 

Dennis 

Dennis Friis Perfect as its clear something was wrong with that list.
I hope you did not have too many users to create from scratch