dpkg: error processing archive sparrow-server_2.0.0-1_arm64.deb (--install):
package architecture (amd64) does not match system (arm64)
Errors were encountered while processing:
sparrow-server_2.0.0-1_arm64.deb
It's here: sparrow-server-2.0.0-aarch64.tar.gz (You have to click 'Show All Assets' - looks like a minor display change on Github). aarch64 and arm64 are equivalent.
dpkg: error processing archive sparrow-server_2.0.0-1_arm64.deb (--install): package architecture (amd64) does not match system (arm64) Errors were encountered while processing: sparrow-server_2.0.0-1_arm64.deb