ubuntu 20.04.02 setup failed with: Startup failed: proxy: tcp: listen tcp :53: bind: address already in use

I just installed using the sh -c "$(curl -sL https://nextdns.io/install)" and haven't been able to get it to start

May 20 06:42:32 mayne systemd[1]: Started NextDNS DNS53 to DoH proxy..
May 20 06:42:32 mayne nextdns[3548]: Starting NextDNS 1.32.2/linux on :53
May 20 06:42:32 mayne nextdns[3548]: Starting mDNS discovery
May 20 06:42:32 mayne nextdns[3548]: Listening on TCP/:53
May 20 06:42:32 mayne nextdns[3548]: Listening on UDP/:53
May 20 06:42:32 mayne nextdns[3548]: Startup failed: proxy: tcp: listen tcp :53: bind: address already in use
May 20 06:42:32 mayne nextdns[3548]: Error: proxy: tcp: listen tcp :53: bind: address already in use
May 20 06:42:32 mayne systemd[1]: nextdns.service: Main process exited, code=exited, status=1/FAILURE
May 20 06:42:32 mayne systemd[1]: nextdns.service: Failed with result 'exit-code'.

setup-router true
control /var/run/nextdns.sock
hardened-privacy false
timeout 5s
use-hosts true
cache-max-age 0s
max-ttl 5s
bogus-priv true
discovery-dns
detect-captive-portals false
auto-activate false
config 599882
cache-size 10MB
report-client-info true
listen localhost:53
log-queries false