[Hide] stopped working

For some reason the shortcode [hide] stopped working on our website.
The homepage has this code, it worked for years before:
[show] still works.

[timed-content-client hide=”0:04:500″]
Content 1
[/timed-content-client]

[timed-content-client show=”0:04:600″]
Content 2
[/timed-content-client]

Can you see what’s wrong?

The page I need help with: [log in to see the link]