I have installed FR on Debian 8 according to the book, upload and everything works fine including preview thumbnails and files arrive on the server.
But open-in-browser previews show "error when loading..." and downloads arrive, but are 0 bytes length.
No error messages are visible in the control panel.
I have redirected PHP error log to syslog but nothing showing up. php.ini checked for the settings from the docs. No changes were made to the installation except Apache port changed (but even on port 80 there is no success). It smells like a PHP problem, but I am running out of ideas. Thanky for any help.
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