Apologies once again for the mistakes in the VM. The new one (and I hope final one) is available for download. Please delete the old one before importing this one.
If you are using UTM on an Apple Silicon Mac, please edit the ~/.bashrc file to add the line:
source ~/colcon_ws/install/local_setup.bash
Sorry for the inconvenience, but if you've already downloaded the VM for Intel machines, can you please delete it and download an updated version? There was an error on the old version.