Stopped working 2023.4

[craigmcgowan]

Unfortunately this has stopped working in 2023.4. I'm unsure of what change has forced this but would love it if it could be updated to work again as the "unused entities" page of Lovelace still works. I'm sure I read this code was largely copied from there, but I wouldn't know what I'd need to change myself to get it working again.

Thank you