Thanks for your answer, I've upgraded to 1.17 and then I've migrated to a shared web hosting server. Migrated DB, Files, and changed every pointment to DB and domain name.
I've tried to set permissions to 777, to the attachment folder, but nothing. I've updated the plugin, even if is the same versione 0.3
From report log I see this error:
IOException: Unable to read resource content
(root)/XXXXXXX/E/ERxp3kVbNpCkfiCM3zJjG0IS0hnchGE4: Unable to read from file
The file exists and the db record there is too!.
I've seen that in the download link are present 3 parameter: key (filename) expires and signature
Could be a signature issue?
Thanks