Issue Summary

Known affected file type:

• HTML (.html) files

Previewing is not working for attachments in the following places:

• Attachments inserted into legacy page content as a thumbnail or link
• Attachments macro
• Attachments menu (... -> Attachments -> Files)

Steps to Reproduce

1. Create a page in the legacy editor.
2. Insert a HTML attachment.
3. Publish the page.
4. Click on the attachment thumbnail to open a preview.

Expected Results

A pop-up should display a preview of the HTML file.

Actual Results

A warning flag is displayed:

We can't preview this file.
You'll have to download the file to view it.
[ Download]

Workaround

• Download from attachments and view it
• Convert the page to the new editor.