Skybrud Redirects strange error

We use this plugin on many Umbraco Cloud sites without issue. I’ve got the issue shown below on one site. Its only on the Live environment. Dev and Local are fine with exactly the same schema and content in place.

FYI this is on a single language (english) site.

The main redirects dashboard (/umbraco#/content?dashboard=redirects) works fine, but the in-page redirects tab on all pages shows as above.

In the example above, the page does actually have 4 redirects in place.

Any ideas?


This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/112911-skybrud-redirects-strange-error