Your roles do not allow you to advance workflow

This error indicates that the user's Site Role doesn't allow them to assign a Workflow to themselves or approve steps in a Workflow. To solve this, follow the steps below:

1. Navigate to Menu -> Administration -> Roles.
2. Edit the user's Site Role (the one they are inheriting for the Site in question).
3. Enable the ability Assign to self and approve steps in a workflow.
4. Click Submit.