Add Bootstrap 4 Navwalker to Roots Sage 9

I had some trouble getting the Bootstrap 4 Navwalker into a new Sage Roots 9x theme. I tried the instructions seen on the navwalker page but kept getting errors and whitescreens. Eventually, here’s what I did to get it working: 1. Download the Bootstrap 4 Navwalker file and add it to the theme: https://github.com/MWDelaney/sage-bootstrap4-navwalker Be … Continued