Unable to change the status on a Project to Current (In Progress) once it has been marked Complete.
You are able to change the status of the project and Save Changes but, Workfront does not save the status change.
The project has the setting "Completion Mode" set to Automatic which means that the project, once all the tasks and issues are completed will automatically set the project to Complete.
When a user tries to change the status it will automatically be set back to complete.
Edit the project > Scroll down to the Settings area and change "Completion Mode" to Manual > Save Changes.
Edit the Project again and change the status to Current > Save Changes. This time the status change will save.