This is on chrome 49.0.2623.112/windows 10.
On ubuntu server 14.04:
wget https://helloworld.letsencrypt.org/ --2016-04-26 17:27:19-- https://helloworld.letsencrypt.org/ Resolving helloworld.letsencrypt.org (helloworld.letsencrypt.org)... 22.214.171.124 Connecting to helloworld.letsencrypt.org (helloworld.letsencrypt.org)|126.96.36.199|:443... connected. ERROR: cannot verify helloworld.letsencrypt.org's certificate, issued by ‘/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X1’: Unable to locally verify the issuer's authority. To connect to helloworld.letsencrypt.org insecurely, use `--no-check-certificate'.
I just created my own certificate through letsencrypt-auto and openssl verify fullchain.pem is failing with:
error 20 at 0 depth lookup:unable to get local issuer certificate
Are the two issues are related?