Unable to preview attachments

[Ege Aktan - Inveon]

Hi all,

I accidentally change a configuration related to custom fields. All of the issues in a project disappeared because of it. Luckily, I manage to retrieve all missing issues after I reverted the configuration. However, preview of the attachments are not visible even though files (mostly pdf) can still be downloaded on jira. Any support is more than welcome :-)

Thanks!