After copying our current environment to a new server PDF-previews suddenly aren;t working anymore. I can download the PDF’s and they look OK, but the preview pane stays empty (apart from the no preview available message which I sometimes get.) Copy is made with an rsync (just tweaked the config.inc to reflect things like the new files_dir location)
Running OJS version 126.96.36.199.
Going from Ubuntu 10.04.4 LTS to debian 8 (jessie)
Is there something I need to install on the new server?
Any help would be apprciated.