strange/not true messages

[patrickdrd]

hello,
I'm getting many
"Warning, no filters were found, no change detection ran - Did the page change layout? update your Visual Filter if necessary."
and "exception:" (empty exception) messages, other than that these watches work fine, I can see the latest change on previews etc, but why are these errors then,?
I'm trying self hosting for now, thanks

[dgtlmoon]

Issue topic template not followed, not enough information.

Add please exactly the version, screenshots the site etc, how you installed etc

[patrickdrd]

Thanks for the quick reply and for pointing to this discussion.

Here is my specific case in more detail:

Install: Docker on Ubuntu server (VPS).​

Image: ghcr.io/dgtlmoon/changedetection.io:latest (UI still shows 0.51.4 in the footer).​

Global “Fetching” setting is Basic fast Plaintext/HTTP Client, so I’m not intentionally using the browser/Chrome fetcher for most watches.​

Problem watch

URL: https://chromewebstore.google.com/detail/downthemall/nljkibfhlpcnanjgbnlnbjecgicbjkge?hl=en-GB

Request tab:

Fetch Method: “System settings default” (so it should use the global Basic HTTP client).​

Proxy: “Default” / effectively no external proxy.

No visual filters or CSS selectors that depend on a very specific layout.

What I’m seeing

On every manual re-check of this Chrome Web Store watch I get:

text
2025-12-07 18:46:40.767 | DEBUG | changedetectionio.queue_handlers:async_get:155 - Successfully async retrieved item: 562fb2c8-fd39-4aca-8fe8-9a8210bfbd4f
2025-12-07 18:46:40.769 | DEBUG | changedetectionio.worker_handler:set_uuid_processing:179 - Started processing UUID: 562fb2c8-fd39-4aca-8fe8-9a8210bfbd4f
2025-12-07 18:46:40.770 | INFO | changedetectionio.async_update_worker:async_update_worker:81 - Worker 3 processing watch UUID 562fb2c8-fd39-4aca-8fe8-9a8210bfbd4f Priority 1 URL https://chromewebstore.google.com/detail/downthemall/nljkibfhlpcnanjgbnlnbjecgicbjkge?hl=en-GB
2025-12-07 18:46:40.778 | DEBUG | changedetectionio.processors:call_browser:90 - Selected proxy key 'no-proxy' as proxy URL '' for https://chromewebstore.google.com/detail/downthemall/nljkibfhlpcnanjgbnlnbjecgicbjkge?hl=en-GB
2025-12-07 18:46:40.778 | DEBUG | changedetectionio.processors:call_browser:94 - Using proxy '' for 562fb2c8-fd39-4aca-8fe8-9a8210bfbd4f
2025-12-07 18:46:40.969 | DEBUG | changedetectionio.processors.magic:init:80 - Guessing mime type, original content_type 'text/html; charset=utf-8', mime type detected 'text/html'
2025-12-07 18:46:41.012 | ERROR | changedetectionio.async_update_worker:async_update_worker:292 - Worker 3 exception processing watch UUID: 562fb2c8-fd39-4aca-8fe8-9a8210bfbd4f
2025-12-07 18:46:41.012 | ERROR | changedetectionio.async_update_worker:async_update_worker:293 -
2025-12-07 18:46:41.013 | DEBUG | changedetectionio.async_update_worker:async_update_worker:386 - Cleared fetcher content for UUID 562fb2c8-fd39-4aca-8fe8-9a8210bfbd4f
2025-12-07 18:46:41.013 | DEBUG | changedetectionio.worker_handler:set_uuid_processing:182 - Finished processing UUID: 562fb2c8-fd39-4aca-8fe8-9a8210bfbd4f
2025-12-07 18:46:41.016 | DEBUG | changedetectionio.async_update_worker:async_update_worker:430 - Worker 3 completed watch 562fb2c8-fd39-4aca-8fe8-9a8210bfbd4f in 0.02s
So:

The worker clearly gets HTML (mime type detected 'text/html').

Then async_update_worker logs an exception, but the message line (293) is completely empty.

In the UI this shows up as an “Exception (empty)” message, with no diff and no real traceback to debug.​

Other watches with the same global settings (e.g. Google Play pages, changelog URLs, simple sites) work fine and do not show this empty exception pattern.

If it helps, I can:

Try forcing this watch to use explicit Basic HTTP client only (no browser) and post a new log snippet.

Or set up a minimal instance with just this single watch and share any extra debugging info you’d like.

Let me know if there is any additional logging or a specific flag you’d like me to enable to capture the real underlying exception text instead of the blank line.

and here's a screenshot of the errors

[patrickdrd]

I even subscribed to check and I'm getting the message "Error: 'str' object has no attribute 'name'" on your instance with chrome extension watch(es)

[patrickdrd]

I enabled telegram notifications and I'm getting some that say that xpath hasn't appeared after 6 attempts as I enabled in settings, but when i click on edit it's working fine!!

[patrickdrd]

all my issues gone when I switched to chrome browser, so these should be related to html part