Transition from customer portal fails

Summary

It is now possible to have transitions on Customer Portal for customers to click in Cloud as a feature from JSD-40.

It fails when the Transition Issue permission for the service desk project is granted to Service Desk Customer - Portal Access.

Environment

• JIRA v1000.141.1
• JIRA Service Desk v3.2.0-OD-18-002-D20160705T034522

Steps to Reproduce

1. Create service desk project and link to Confluence KB space
2. Enable the "Show transition in the Customer Portal" at the project workflow (for the purpose of testing, enable this for the transition after a ticket creation).
3. Log in as a customer
4. Create an issue in the portal
5. Transition the issue to the status in Step 2.

Expected Results

Successful transition.

Actual Results

No information in logs. Error in UI:

Notes

This issue only happens when logged in as a Customer. Admins have no problem transitioning in customer portal.

Workaround

None at the moment.