Same here. I get it both when I’m accessing directly via IP and via NabuCasa.
Logger: frontend.js.latest.202304111
Source: components/system_log/__init__.py:257
First occurred: April 13, 2023 at 17:02:46 (21 occurrences)
Last logged: 15:11:23
http://10.0.0.161:8123/lovelace/home:0:0 Uncaught
Has anyone opened a Github bug on it? I’ve opened this bug on the issue. Please add anything else that would be helpful. There really isn’t much more to add to the bug than this…it’s a mystery!
When it comes to frontend errors, please also check the browser console and paste the error here. The browser error will have the full stack trace for the Javascript code.
I usually see this too:
Logger: frontend.js.latest.202305032
Source: components/system_log/__init__.py:257
First occurred: 08:33:58 (16 occurrences)
Last logged: 09:19:39
https://0.ui.nabu.casa/lovelace-rezsi/0:0:0 Uncaught
https://0.ui.nabu.casa/dashboard-klima/0:0:0 Uncaught
Chrome browser console:
wiser-schedule-card.js:2571 WISER-SCHEDULE-CARD Version 1.1.8
wiser-zigbee-card.js:1035 WISER-ZIGBEE-NETWORK-CARD Version 1.1.0
history-explorer-card.js?hacstag=4403747941040:79 HISTORY-EXPLORER-CARD Version 1.0.45
mushroom.js:2823 🍄 Mushroom 🍄 - 2.1.3
/lovelace-rezsi/0:1 Uncaught DOMException: Failed to execute 'define' on 'CustomElementRegistry': the name "mushroom-select" has already been used with this registry
apexcharts-card.js:835 APEXCHARTS-CARD v2.0.1
/lovelace-rezsi/0:1 Uncaught DOMException: Failed to execute 'define' on 'CustomElementRegistry': the name "apexcharts-card-action-handler" has already been used with this registry
Remove you Nabu casa url 
This is caused by trying to load the js twice in the browser. Edit dashboard and from 3 dots select manage resources. Likely both of these will be listed twice. Delete one of the duplicates. If not sure which one, remove both these from HACs, delete the entries that are left in manage resources and reinstall from HACs.
Thanks, removed the ones from \local.…
/local/apexcharts-card.js
/local/mushroom.js
I kept the others from /hacsfiles/.
Testing it now, but seems it resolved.
