A solution from this post has solved the issue - DK0006 Couldn't download docker images
First, run the following command in terminal after shutting down both Devkinsta & Docker:
sudo ln -s "$HOME/.docker/run/docker.sock" /var/run/docker.sock
Dunno what this does but it allowed me to launch Devkinsta without any errors.
Next, I went into Devkinsta settings and changed the ports to 80 (http) and 443 (https).
Once all this was done, it appears everything is back to normal and I can view & work on my sites locally.