Hi Solus community!
-> I had the same issue as bertaga, meaning that the resolve1.service was not found, the simple solution is to enable sytemd's resolved.service:
sudo systemctl start systemd-resolved.service
sudo systemctl enable systemd-resolved.service
Then try to wg-quick up...
Maybe this is helpful information.
PS: Unfortunately Snap did not help as it produced some errors. I have not tried to remove the dns entries in my wg-config as appmath suggested, this might help, not sure though...