Stuck at "Loading data" after upgrade of OS and Core

Let me start by saying that I have not encountered such issue before. I have been running previous version of OS and Core 2023.7.3 - all fine. I run Supervised install in VM. I upgraded OS first, then core. Everything looked fine.
At first, I noticed my tablet is hanging at “loading data” screen - weird. I checked my phone, app was working. So I figured I would reload tabled…
When I opened app on my phone, there was message down there that there is newer version of frontend available - so I hit reload, and same started to happen on my phone too.
When I open HA on my PC, regardless if local http or external https, it takes ages to load, maybe 15-20 minutes. Once it opens, all browsing, device controls and everything works ok. When I try to open new tab again, it loads forever.
Also it is worth mentioning that everything runs OK, it is just UI that I cannot get to load. No issues were seen before.
I have tried incognito, clearing cache, all that - does not help. When I do it, logon screen pops instantly, I log in, enter 2FA code, and then it loads and loads.
I have tried rebooting VM multiple times, even host on which VM runs - no luck.
I even tried rebooting host where VM runs - no change.
I have tried restoring backup from UI once I managed to get in - host went down, I thought it is restoring backup. But even after 20 minutes, nothing happened. So I rebooted VM and it came back up with OS 10.4 and Core 2023.8.0.
Any ideas?

I was able to restore things, but I am not sure where the issue is.
I found log:

Logger: homeassistant.components.websocket_api.http.connection
Source: helpers/translation.py:230
Integration: Home Assistant WebSocket API (documentation, issues)
First occurred: 7:42:18 PM (226 occurrences)
Last logged: 9:56:01 PM

[139857678359232] Error handling message: Unknown error (unknown_error) xxx from xxx (Mozilla/5.0 (Linux; Android 13; 21051182G Build/TKQ1.221013.002; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/115.0.5790.138 Safari/537.36)
[139857774779200] Error handling message: Unknown error (unknown_error) xxx from xxx (Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Mobile Safari/537.36)
[139857442572736] Error handling message: Unknown error (unknown_error) xxx from xxx (Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Mobile Safari/537.36)
[139857628356032] Error handling message: Unknown error (unknown_error) xxx from xxx (Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36)
[139857390493888] Error handling message: Unknown error (unknown_error) xxx from xxx (Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36)
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/decorators.py", line 26, in _handle_async_response
    await func(hass, connection, msg)
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py", line 417, in handle_get_services
    payload = await _async_get_all_descriptions_json(hass)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py", line 398, in _async_get_all_descriptions_json
    descriptions = await async_get_all_descriptions(hass)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 612, in async_get_all_descriptions
    translations = await translation.async_get_translations(
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/translation.py", line 318, in async_get_translations
    cached = await cache.async_fetch(language, category, components)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/translation.py", line 209, in async_fetch
    await self._async_load(language, components_to_load)
  File "/usr/src/homeassistant/homeassistant/helpers/translation.py", line 230, in _async_load
    raise int_or_exc
homeassistant.loader.IntegrationNotFound: Integration 'irrigation_unlimited' not found.

Especially last line caught my attention, and the fact that 2023.8.0 brings translated services. I assume there are some leftovers from that integration, together with new translated services, it may be breaking?
But how do I clear it? All I did is - I just re-downloaded irrigation unlimited from HACS and that resolved my access. But I would like to remove it without that error. Ideas?

Hi @stomko, I seem to have a very similar issue, see here, did you find a resolution? Thanks.

I did - installed back that integration. Luckily for me it is still available