Export error, for a new user created on Customer Portal (SD)

Steps to reproduce:
1. Create project SD
2. Install Xporter
3. Create new template with all scopes SD
4. Create new user by customer portal
5. Create your first request (ex. Help Center)
6. Click at logout.
7. Click at login and export a request created.
7. Go to Xporter and a new error occurs, when export (view error on attachments)