no python3 ?

[hemna]

└─> msrsync
/usr/bin/env: ‘python2’: No such file or directory

[pythoninthegrass]

It's not obvious from the readme, but you just need to run

wget -O msrsync https://raw.githubusercontent.com/jbd/msrsync/master/msrsync3 && chmod +x msrsync

placing it somewhere in your $PATH (e.g., ~/.local/bin)