`unknown_error` when retrieving backups

[tetele]

Checklist

• [X] I have updated to the latest available Home Assistant version.
• [X] I have cleared the cache of my browser.
• [X] I have tried a different browser to see if it is related to my browser.
• [ ] I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

I have been careless with pruning and a large number of daily backups have accumulated on my network storage (200+ backups, totaling ~46GB). When I access https://my.home-assistant.io/redirect/supervisor_snapshots/ apart from the fact that I get an incorrect message stating there are no backups, the list never gets populated and I find an error in the console

hassio-backups.ts:83 Uncaught (in promise) 
{code: 'unknown_error', message: ''}

Describe the behavior you expected

Leaving aside a potential loading animation, telling me that the backups are not available yet, I'd like to eventually see my 200 backups so that I can delete the ones which are not used.

Steps to reproduce the issue

1. Go to https://my.home-assistant.io/redirect/supervisor_snapshots/
2. Wait
3. The error appears

What version of Home Assistant Core has the issue?

2024.7.3

What was the last working version of Home Assistant Core?

No response

In which browser are you experiencing the issue with?

Chrome 126.0.6478.127

Which operating system are you using to run this browser?

MS Win 11

State of relevant entities

No response

Problem-relevant frontend configuration

No response

Javascript errors shown in your browser console/inspector

hassio-backups.ts:83 Uncaught (in promise) {code: 'unknown_error', message: ''}
value @ hassio-backups.ts:83
await in value (async)
value @ hassio-backups.ts:114
_$AE @ reactive-element.ts:1378
performUpdate @ reactive-element.ts:1345
scheduleUpdate @ reactive-element.ts:1263
_$Ej @ reactive-element.ts:1235
await in _$Ej (async)
requestUpdate @ reactive-element.ts:1210
u @ reactive-element.ts:948
x @ reactive-element.ts:931
E @ lit-element.ts:115
a @ hassio-backups.ts:53
finisher @ custom-element.ts:41
runClassFinishers @ decorate.js:237
s @ decorate.js:15
(anonymous) @ hassio-backups.ts:53
await in (anonymous) (async)
d.a @ async module:49
2853 @ 2853-wDB_JUGS5mI.js:1
d @ bootstrap:19
Promise.then (async)
load @ hassio-panel-router.ts:34
value @ hass-router-page.ts:152
performUpdate @ reactive-element.ts:1331
scheduleUpdate @ reactive-element.ts:1263
_$Ej @ reactive-element.ts:1235
await in _$Ej (async)
requestUpdate @ reactive-element.ts:1210
u @ reactive-element.ts:948
x @ reactive-element.ts:931
o @ hass-router-page.ts:48
F @ hassio-panel-router.ts:12
u @ lit-html.ts:1124
g @ lit-html.ts:1535
_$AI @ lit-html.ts:1379
G @ lit-html.ts:2175
update @ lit-element.ts:165
performUpdate @ reactive-element.ts:1331
scheduleUpdate @ reactive-element.ts:1263
_$Ej @ reactive-element.ts:1235
await in _$Ej (async)
requestUpdate @ reactive-element.ts:1210
set @ reactive-element.ts:726
value @ hassio-router.ts:76
value @ hass-router-page.ts:91
performUpdate @ reactive-element.ts:1331
scheduleUpdate @ reactive-element.ts:1263
_$Ej @ reactive-element.ts:1235
await in _$Ej (async)
requestUpdate @ reactive-element.ts:1210
set @ reactive-element.ts:726
j @ lit-html.ts:1875
_$AI @ lit-html.ts:1817
v @ lit-html.ts:1187
g @ lit-html.ts:1532
_$AI @ lit-html.ts:1379
G @ lit-html.ts:2175
update @ lit-element.ts:165
performUpdate @ reactive-element.ts:1331
scheduleUpdate @ reactive-element.ts:1263
_$Ej @ reactive-element.ts:1235
await in _$Ej (async)
requestUpdate @ reactive-element.ts:1210
set @ reactive-element.ts:726
value @ supervisor-base-element.ts:102
(anonymous) @ supervisor-base-element.ts:142
i @ store.js:19
(anonymous) @ collection.js:25
Promise.then (async)
c @ collection.js:25
p @ collection.js:27
(anonymous) @ collection.js:52
subscribe @ collection.js:96
value @ supervisor-base-element.ts:140
(anonymous) @ supervisor-base-element.ts:175
value @ supervisor-base-element.ts:159
value @ supervisor-base-element.ts:84
performUpdate @ reactive-element.ts:1329
scheduleUpdate @ reactive-element.ts:1263
_$Ej @ reactive-element.ts:1235
await in _$Ej (async)
requestUpdate @ reactive-element.ts:1210
u @ reactive-element.ts:948
x @ reactive-element.ts:931
E @ lit-element.ts:115
(anonymous) @ provide-hass-lit-mixin.ts:11
(anonymous) @ url-sync-mixin.ts:29
i @ supervisor-base-element.ts:42
i @ hassio-main.ts:17
finisher @ custom-element.ts:41
runClassFinishers @ decorate.js:237
s @ decorate.js:15
(anonymous) @ hassio-main.ts:17
(anonymous) @ entrypoint.ts:29
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Additional information

No response