Card not found - configuration error

[jmurphylaois1]

Ensured it was registered in resources under Dashboards.

Tried version 1.1 and 1.0 but both give the same error, custom element not found.

On the console if i run: customElements.get("raptor-grid-card"), I get undefined.

The issue is this is defined twice in the file:
const RG_LitBase =
window.LitElement ||
Object.getPrototypeOf(
customElements.get("ha-panel-lovelace") ||
customElements.get("hui-view")
);

[markjsmith]

Same issue here

[Inter-Raptor]

Thanks @jmurphylao1 for the very detailed report — and thanks as well @markjsmith 🙏
Your investigation (especially the customElements.get('raptor-grid-card') check) really helped a lot. Without it, I probably wouldn’t have found the root cause that quickly.

✅ You were absolutely right: the issue was caused by a duplicate declaration of RG_LitBase in the JS file.
That triggers a JavaScript error during load, so the card never registers → customElements.get('raptor-grid-card') returns undefined, and Home Assistant shows “Custom element doesn’t exist / element not found”.

🔧 Fixed now: I removed the duplicate declaration and published a new release.

➡️ To fix it on your side:

HACS → Frontend → Raptor Grid Card → Update (update to the latest version)

Restart Home Assistant

Do a hard refresh in the browser (Ctrl+F5) or clear the site cache if needed

If you still see the issue after updating, please share:

the version shown in HACS, and

a screenshot/copy of the browser console logs (F12 → Console) when loading the dashboard,

and I’ll help you troubleshoot further.

Thanks again for your time and for digging into it! 🙌