Symptoms

Clicking on All Open Reviews option (in Crucible) returns a warning message like in the image below:

Cause

The current user doesn't have the view permission configured.

Resolution

Grant view permission to the user by doing the following:

1. Go to Administration > Security Settings > Permission Schemes.
2. Select Edit button related to the scheme that your project is bound to.
3. At Edit Permission Scheme go to view and click in corresponding edit button. 
4. Provide the user the Ability to view a review and then click save.