Issues using LG TV's browser as a Display device

Hi all,

Has anyone had any luck using a large screen TV’s browser as a display device?

Where I have got to, is it looks like the core cards render, but ALL of the custom cards receive the message “Custom element doesn’t exist: xxxx”

These custom cards all render on my Mac, Phone etc.

Wondering if it is a limitation of the browser on the TV itself?

Thanks for the advice!