error reading config file in `sitediff serve` about sitediff HOT 2 CLOSED

Also, here is the sitediff diff command running okay

~/sitediffs/www.mysite.com$ sitediff diff
[sitediff] Reading config file: /home/user/sitediffs/www.mysite.com/sitediff/sitediff.yaml
[sitediff] Using sites from cache: before
...

Also I'm running Debian 8.7 (Jessie)

from sitediff.

@slefevre-highlights Yes, I was able to reproduce this.

This happens if sitediff serve is run before sitediff diff - as the later creates the output folder with diff and the configuration file settings.yml

I have created a PR to output a message that you need to run diff before running serve.

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