Ahh... the joys of GL.iNet firmware not being in version sync across devices. I won't miss it if it were to ever leave.
It's probably for the best your conf wasn't. The GL.iNet stock conf leaves a bit to be desired to properly tighten up security, privacy:
cat <<- '__EOF' >> /etc/dnscrypt-proxy2/dnscrypt-proxy.toml
# edit your existing `.toml` to properly enable these security settings
# in their respective sections or dnscrypt-proxy won't start
user_name = 'nobody'
dnscrypt_servers = false
odoh_servers = true
require_dnssec = true
require_nolog = true
require_nofilter = false
disabled_server_names = [ 'quad9-doh-ip4-port443-nofilter-pri', 'quad9-doh-ip4-port443-nofilter-alt', 'quad9-doh-ip4-port443-nofilter-ecs-pri', 'quad9-doh-ip4-port443-nofilter-ecs-alt', 'quad9-doh-ip4-port443-filter-ecs-pri', 'quad9-doh-ip4-port443-filter-ecs-alt' ]
dnscrypt_ephemeral_keys = true
tls_disable_session_tickets = true
bootstrap_resolvers = ['1.1.1.1:53', '1.0.0.1:53']
__EOF
Then
chown -R nobody:nogroup /etc/dnscrypt-proxy2/
/etc/init.d/dnscrypt-proxy restart
As all things in life, YMMV.