After installing the instructions here for step by step install, I still can't install Gazebo11 on Ubuntu Focal. I get the following error message:
sudo apt-get install gazebo11 Reading package lists... Done Building dependency tree Reading state information... Done Package gazebo11 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'gazebo11' has no installation candidate
