edaviewer.com example design causes internal server error 500

[Partmedia]

Describe the bug
Navigating to https://edaviewer.com/example triggers an internal server error:

To Reproduce
Steps to reproduce the behavior:

1. Go to 'https://edaviewer.com/example'
2. See error

Expected behavior
No error.

Screenshots
See above.

Environment (please complete the following information):

• OS: FreeBSD 12.2-RELEASE-p3
• Firefox 85.0 (64-bit)

Additional context
N/A