DNSCrypt usage problem

I am following instructions from https://www.whonix.org/wiki/Secondary_DNS_Resolver

after installing libsodium and dnscrypt, i run it and get error:

sudo dnscrypt-proxy --tcp-only -R cypherpunk
[NOTICE] Starting dnscrypt-proxy 1.4.3
[INFO] Initializing libsodium for optimal performance
[INFO] Generating a new key pair
[INFO] Done
[ERROR] Unable to bind (UDP) [Address already in use]

how to fix?

[Imprint] [Privacy Policy] [Cookie Policy] [Terms of Use] [E-Sign Consent] [DMCA] [Contributors] [Investors] [Priority Support] [Professional Support]