Totally blank posts (no placeholders, nothing))

Hi Timo and thank you for creating this plugin.

For the last 2 days I’m trying to make it work on my sites but no luck so far …
I know is nothing wrong with my Amazon API account because I used this plugin witch does approximately the same thing as ASA and I successfully imported some products on my site, I just think ASA is better and I would like to use it if only it would work for me.

The theme I use is Pronto, the ASA Status says Ready, I have carefully followed the instructions from the manual, I’ve deleted cache a few times from the ASA plugin menu, WP Super Cache plugin and from wp menu also, changed my Access & Secret keys (just to be sure), tried with different ASINs/ISBNs and after publishing all I get is a completely blank post, no placeholders no nothing other than the post title.

I even tested it on a „spare“ domain with a fresh WP installation using the Twenty Fourteen theme and nothing else installed but the default wp plugins and ASA and I got the same result.

Maybe I’m doing something wrong so I would really appreciate some help with it.