I use that theme on one of my sites– my vendor’s Pro Dashboard page is titled: Shop Dashboard. All I had to do was re-name the title field for that page. wp admin > pages go to the page where you have the pro dashboard shortcode… then change the page title. I have not changed that template at all.
I think when you install the BuddyBoss demo stuff that comes with that theme, they name the page WC Vendors Pro Dashboard?
What is the page titled.. then page where you have your pro dashboard shortcode [wcv_pro_dashboard]?