If you're running Hiri snap package on Linux, with snapd version < 2.28.5, you might not be able to open links unless you install an additional package. To check which version of snapd you're running:
$ snap --version
You can fix this by installing the
snapd-xdg-open package, e.g. on Ubuntu based distros:
sudo apt-get install snapd-xdg-open
However, if you're not running an Ubuntu-based distro, this package might not be available. In that case, it's best that you download and use the binary tarball.