openwrt dnscryptについて

dnscrypt-server-dockerを使用してdnscryptサーバーを自己ホストします（https://github.com/jedisct1/dnscrypt-server-docker)

Mac OS Xでテストしましたが、うまくいきます。

$ sudo dnscrypt-proxy \                            
    --provider-key=xxxx \
    --resolver-address=xxxx:xxxx \
    --provider-name=2.dnscrypt-cert.xxxx.org 

[NOTICE] Starting dnscrypt-proxy 1.6.0
[INFO] Generating a new session key pair
[INFO] Done
[INFO] Server certificate #808464433 received
[INFO] This certificate looks valid
[INFO] Chosen certificate #808464433 is valid from [2015-12-09] to [2015-12-10] [INFO] Server key fingerprint is xxxxx
[NOTICE] Proxying from 127.0.0.1:53 to xxxx:xxxx

しかし、openwrtで実行すると間違っています。

[NOTICE] Starting dnscrypt-proxy 1.6.0
[INFO] Generating a new session key pair
[INFO] Done
[INFO] Server certificate #808464433 received
[INFO] This certificate has not been activated yet
[ERROR] No useable certificates found
[INFO] Refetching server certificates
[INFO] Server certificate #808464433 received
[INFO] This certificate has not been activated yet
[ERROR] No useable certificates found

dnscrypt-proxyをアップグレードしようとしましたが、効果は同じではありません。

どうすれば解決できますか？