card dead after core-2025.3.3

[ruteclrp]

Seen increasingly more people having issues with the card loading after core-2025.2

It worked for me until core 2025.3.3 but it is now totally dead.

Not sure how to diagnose - but seems to be a more general issue

[GWilsnach]

Same here, it worked for me until core 2025.3.3 but it is now totally dead.

[IvoSvejcar]

Same issue:

[boulete31]

sorry, but same here

[BSD31]

Same for me !

[boulete31]

Is this fix still good ?

#88 (comment)

[ElderingE]

Same issue over here. Hoping on a fix...

[bamnoru]

Same issue, but on core-2025.2.4 (so, not an Home assistant issue).

JS Console errors:

Access to script at 'https://unpkg.com/lit-html@%5E1.0.0?module' from origin 'https://...' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.Understand this errorAI
lit-element.js:14

GET https://unpkg.com/lit-html@%5E1.0.0?module net::ERR_FAILED 520Understand this errorAI
interieur:1 Access to script at 'https://unpkg.com/lit-html@%5E1.0.0/lit-html?module' from origin 'https://...' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.Understand this errorAI
lit-element.js:19

GET https://unpkg.com/lit-html@%5E1.0.0/lit-html?module net::ERR_FAILED 520

[Steamerzone]

Same here, I'm sure I had it working for a few hours on core-2025.3.3 yesterday, this morning it stopped working.
Loading from unpkg.com looked slow yesterday.

So something external.

[Summer-of69]

Is this fix still good ?

#88 (comment)

I had the same problem after updating to 2025.3.3.
The change mentioned above solved the problem!

[ChristoduT]

Have the same issue on all of my home assistant devices. CUSTOM ELEMENT DOESN'T EXIST: FLEX-HORSESHOE-CARD

[boulete31]

Is this fix still good ?
#88 (comment)

I had the same problem after updating to 2025.3.3. The change mentioned above solved the problem!

Indeed, this fix works like a charm.

[Steamerzone]

The fix did work fine after a few tries.

• make sure the name of the .js file is correct ( lit-core.min.js )
• clear the browser cache!

[HaMs6josef]

My HA-Version 2025.1.2
flex-horseshoe-card it works proberly, until today or yesterday
Error: Custom element doesn’t exist: flex-horseshoe-card

As i remind, it works until 1-2 days ago
I restored Backup from one week ago - same problem!?!?

Any hint?

This
#88 (comment)
worked for me :-)

[ChristoCoetzee]

Is this fix still good ?
#88 (comment)

I had the same problem after updating to 2025.3.3. The change mentioned above solved the problem!

Indeed, this fix works like a charm.

This worked for me

[taHC81]

Yep, thanks for that!