Something wrong with web UI

[kenkendk]

Hi @funkysloth, welcome to the forum.

@funkysloth

starting from roughly one week, I noticed the UI behaving strangely. As soon as I log in it tells connection lost (there’s a popup), then a countdown (still a popup), then it logins automatically (without clicking anything), then I notice on the top of the page that it tries to “verify the backend data”, it starts to count files, then before it completes it says again that connection is lost. It seems that only one of the two configurations is problematic.

The timing is most likely related to the new beta release that went out 2024-11-29, which also had a rewrite of the authentication code.

The “connection lost” dialog is only checking the connection from the browser to Duplicati. Duplicati may well be running fine in the background, as if you were not logged in at all.

The countdown should only happen if there are two consecutive login failures. Can you try to clear the browser cache?

Also, if you can try the developer tools in your browser, maybe we can get a closer look at what requests are failing and indentify the sequence.

@funkysloth

not sure if those are my uptime checker server which pings regularly duplicati… however, scrolling a bit above I have:

fail: Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware[1]
      An unhandled exception has occurred while executing the request.
      Duplicati.WebserverCore.Exceptions.NotFoundException: No active backup

That one is mostly log-spam caused by an older design of the API. If no backup task is active, it returns 404, which the logging code thinks is a failed request and logs it. It is safe to ignore.

@funkysloth

Please not that the issue is not systematic. For example this morning it failed the backup job (notice last successful one is from yesterday). Maybe last failed one is from 2-3 days ago: it’s somehow intermittent, and it seems to me that only affects “Documents” and not “Pictures”. But again, in my opinion they are almost identical configurations and identical remote buckets. Also, I am pretty sure no new document/picture has been added to the collection, so I am excluding that some problematic files can cause this.

I do not fully understand this part. The screenshots are just for the login, that view has no effect on the running backup. What error messages do you see on the failed backups?