These are due to https://bugs.launchpad.net/click-reviewers-tools/+bug/1595184:
unknown interface 'service' lint-snap-v2_slots (service, service)
unknown interface 'nmcli' lint-snap-v2_plugs (nmcli, nmcli)

Note to reviewers-- feel free to accept these errors in the future while that bug is open.

Contacted the uploader and this will be fixed in the next upload:
package contains external symlinks: usr/lib/systemd/system/network-online.target.wants/NetworkManager-wait-online.service, lib64/ld-linux-x86-64.so.2 lint-snap-v2_external_symlinks