Clicking on thumbnails of attachments used to display the full image. It currently does not work. This occurs for all attachments.
No errors in jira/logs/catalina.out; however, inspecting the page revealed that fileviewer.js is missing:
Uncaught Error: No fileviewer.js batch.js?locale=en-UK:19
Uncaught Error: No jira/fileviewer/module-backend/asynchronous batch.js?locale=en-UK:19
What could the issue be?