In Home Assistant 2023.5 Polymer will no longer be provided by Home Assistant.

[rodpayne]

Is your feature request related to a problem? Please describe.
2023-04-11 14:46:28.897 WARNING (MainThread) [frontend.js.latest.202304061] WARNING: Polymer will be removed from window in Home Assistant 2023.5. More info: https://developers.home-assistant.io/blog/2023/04/04/deprecating_polymer

In Home Assistant 2023.5 Polymer will no longer be provided by Home Assistant. If you use Polymer now, we recommend you switch to Lit. If you want to keep using Polymer, you will have to load Polymer yourself.

Describe the solution you'd like
Either switch to Lit or load Polymer.

Describe alternatives you've considered
Stop using the card and find an alternative.

Additional context