Dashboard UI won't load | Home Assistant | Page 1

ebon sorrel Feb 25, 2025, 3:32 AM

#

I recently updated my HA, and now my Lovelace dashboard won't load. When I load the webpage, I briefly see my UI flicker, then it immediately goes to a blank screen. I've tried multiple browsers (Chrone, Firefox) and my Android mobile app. If I clear site data and cookies, I'm allowed to log in, but the screen is completely blank.

I checked the Developer Tools in Firefox and it looks like there's an error on the page. My question is how I might go about fixing it, since I can't log in to restore a backup. I'm running HA Yellow

The error in Developer Tools:

Source map error: Error: JSON.parse: unexpected character at line 1 column 1 of the JSON data
Stack in the worker:parseSourceMapInput@resource://devtools/client/shared/vendor/source-map/lib/util.js:163:15
_factory@resource://devtools/client/shared/vendor/source-map/lib/source-map-consumer.js:1066:22
SourceMapConsumer@resource://devtools/client/shared/vendor/source-map/lib/source-map-consumer.js:26:12
_fetch@resource://devtools/client/shared/source-map-loader/utils/fetchSourceMap.js:83:19

lime jewel Feb 26, 2025, 8:06 AM

#

The error that you see could be related to whatever you're experiencing. I just inspected one of the "lab" dashboards and it has 784 errors and 80 warnings (but everything is working fine for the most part.)

#

What happens if you try navigating directly to a different page such as http://10.10.10.2:8123/config/dashboard which should take you to your Settings page? (Replacing 10.10.10.2 with your HA's IP address.)

ebon sorrel Feb 26, 2025, 4:29 PM

#

thanks for the idea. i tried /config/dashboard and got the same behavior (UI came up, then the screen immediately went blank).

is there a way to force a reboot into safe mode to maybe disable the offending plugin?

#

tbh, i dont know if it's actually a plugin or what's causing the issue

lime jewel Feb 26, 2025, 6:32 PM

#

There is a Safe Mode. Since you don't have a working UI, you would have to SSH into HA. From there, you can use the command ha core restart --safe-mode.

ebon sorrel Feb 26, 2025, 7:33 PM

#

yeah, that's what i figured. i have an SSH addon installed, but i'm not sure i have actual ssh credentials to log directly into the HA yellow box itself. i'll dig some more, thanks

#

it would be nice if there was a webhook that i could hit to reboot into safemode

lime jewel Feb 27, 2025, 8:33 AM

#

ebon sorrel it would be nice if there was a webhook that i could hit to reboot into safemode

There's nothing that I'm aware of like that (doesn't necessarily mean that there's isn't), but, in hindsight, it wouldn't be a bad automation to set up. Just in case in the future something goes wonky. 😉

#Dashboard UI won't load