Autoware building error

While trying to build Autoware, following this guide, the following errors appear, as seen in the image:

Any suggestions as to how I could fix this? I've already re-installed ROS and Catkin tools.

The contents of env.sh file:

#!/usr/bin/env sh
# generated from catkin/cmake/templates/env.sh.in

if [ $# -eq 0 ] ; then
  /bin/echo "Usage: env.sh COMMANDS"
  /bin/echo "Calling env.sh without arguments is not supported anymore. 
Instead spawn a subshell and source a setup file manually."
  exit 1
fi

# ensure to not use different shell type which was set before
CATKIN_SHELL=sh

# source setup.sh from same directory as this file
_CATKIN_SETUP_DIR=$(cd "`dirname "$0"`" > /dev/null && pwd)
. "$_CATKIN_SETUP_DIR/setup.sh"
exec "$@"