Autoware ade : Not able to run demo videos

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These are the steps that I have followed after installing the ade environment.

$ cd ~/adehome/AutowareAuto
$ ade --rc .aderc-amd64-foxy start --update --enter 
ade$ cd AutowareAuto
ade$ vcs import < autoware.auto.foxy.repos
ade$ colcon build

after colcon build, I'm getting file not found errors. I went back and checked that the files are present are present in the required path and also have the required permissions.

After colcon build I have to run the following command:

ade$ source install/setup.bash

What am I missing?

My system has Ubuntu 20.04 and ROS noetic running. I also have foxy installed but I haven't sourced the foxy environment. So my ade is running on my noetic environment.