I followed the tutorials of basic server configuration, LEMP, wordpress on nginx and WP super cache. When I activate photon plugin images are not shown on my webpage. When I press "open image in a new tab" is says:
A TimThumb error has occured
The following error(s) occured:
You may not fetch images from that site. To enable this site in timthumb, you can either add it to $ALLOWEDSITES and set ALLOWEXTERNAL=true. Or you can set ALLOWALLEXTERNAL_SITES=true, depending on your security needs.

Also when I open console (F12) I get image errors, 404 not founds. I have configured jetpack correctly but do not know what the problem is, maybe some security issue not allowing jetpack do its job.