The latest Understrap version renames the WP_Bootstrap_Navwalker class understrap_WP_Bootstrap_Navwalker. Since the old class no longer exists, calling it in the child them causes a fatal error. ref: https://github.com/understrap/understrap/issues/540
The latest Understrap version renames the
WP_Bootstrap_Navwalker
classunderstrap_WP_Bootstrap_Navwalker
. Since the old class no longer exists, calling it in the child them causes a fatal error. ref: https://github.com/understrap/understrap/issues/540