Black Screen Issue: Please update your theme to ensure WordPress 5.6 compatibility. Dentalia 2.1 and Recycle 2.1 are now available on ThemeForest.
Please tell me how can I edit the address, phone information below the menu, I am unable to find from where to change it.
Also how do I change the menus and text being displayed in the footer.
The header widget area and the Footer are built with widgets. You can edit them in Appearance -> Widgets. I recommend you to install the Classic Widgets plugin, which will make the editing experience a bit more pleasant.