Gantt Chart not available on Upgrade

I recently upgraded from Suitecrm 7.1.3 to 7.5.1 . But in project management Gantt chart is not available. Please suggest on this as i need gantt chart for project module in SuiteCRM


Where are you looking for the Gantt Chart option?

If I navigate to a project, and expand the dropdown on the “Edit” button, I have an option to “View Gantt”

Also, what upgrade path did you take?
Did you go straight from 7.1.3 to 7.5.1, or follow another path?