[FATAL] Unsupported key in configuration file: [fallback_resolver]

[Kylvan-8]

Hello since i've updated my dnscrypt-proxy version to 2.2.1 with the script provided on the wiki

I get this error from my logs:

[FATAL] Unsupported key in configuration file: [fallback_resolver]

Nothing have change in the .toml file. Same as before updating.

Can you please explain me what is going on and how i can resolve this issue ?

Best regards and happy new year

[jedisct1]

fallback_resolver was deprecated in version 2.0.38.

You should replace it with bootstrap_resolvers, that takes a list of possible resolvers instead:

dnscrypt-proxy/dnscrypt-proxy/example-dnscrypt-proxy.toml

Lines 214 to 244 in 916e84e

	## Bootstrap resolvers
	##
	## These are normal, non-encrypted DNS resolvers, that will be only used
	## for one-shot queries when retrieving the initial resolvers list and if
	## the system DNS configuration doesn't work.
	##
	## No user queries will ever be leaked through these resolvers, and they will
	## not be used after IP addresses of DoH resolvers have been found (if you are
	## using DoH).
	##
	## They will never be used if lists have already been cached, and if the stamps
	## of the configured servers already include IP addresses (which is the case for
	## most of DoH servers, and for all DNSCrypt servers and relays).
	##
	## They will not be used if the configured system DNS works, or after the
	## proxy already has at least one usable secure resolver.
	##
	## Resolvers supporting DNSSEC are recommended, and, if you are using
	## DoH, bootstrap resolvers should ideally be operated by a different entity
	## than the DoH servers you will be using, especially if you have IPv6 enabled.
	##
	## People in China may want to use 114.114.114.114:53 here.
	## Other popular options include 8.8.8.8, 9.9.9.9 and 1.1.1.1.
	##
	## If more than one resolver is specified, they will be tried in sequence.
	##
	## TL;DR: put valid standard resolver addresses here. Your actual queries will
	## not be sent there. If you're using DNSCrypt or Anonymized DNS and your
	## lists are up to date, these resolvers will not even be used.
	bootstrap_resolvers = ['9.9.9.9:53', '8.8.8.8:53']

But since you jumped a couple versions, maybe it would be better to start fresh from the current example file.

[Kylvan-8]

Thank you for your quick reply jedisct as usual !