The page previously hosting the Singularity container seems to be down. This means that the instructions on how to retrieve Singularity is now outdated.
Also, I am not sure whether it works to run the previous command to retrieve the actual container. It would make more sense to leave this out for now, and find a new hosting option. Either using Singularity on some other site, or transferring the container to Docker instead.
The page previously hosting the Singularity container seems to be down. This means that the instructions on how to retrieve Singularity is now outdated.
Also, I am not sure whether it works to run the previous command to retrieve the actual container. It would make more sense to leave this out for now, and find a new hosting option. Either using Singularity on some other site, or transferring the container to Docker instead.