Shortcode for tag list stopped working

For quite some time, until very recently, this link worked

[topicspage]: {{< ref "tags/topics" >}} 

It produced a list of all the pages with this in their headers:

 - topics 

I’m not sure why it stopped working across all my sites. I wonder if there is a better way to do this.

I’m afraid this is related to this, but that seems never to have worked, while my lists only just stopped working.

Hi there,

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