Failed to authenticate with Transmission

Sonarr version (exact version): 3.0.3.911
Mono version (if Sonarr is not running on Windows):6.10.0.104
OS: Linux raspberrypi 5.4.51-v7l+ #1333 SMP Mon Aug 10 16:51:40 BST 2020 armv7l GNU/Linux
Debug logs:
Description of issue: Receive the following message when attempting to connect to Transmission: Failed to authenticate with Transmission.

When I try to add Transmission as a downloader in Sonarr and test the connection, I get an authentication failed error.

The error is located at the level of the identifier. :smile:

Detail under Sonarr:

NzbDrone.Core.Download.Clients.DownloadClientAuthenticationException: Failed to authenticate with Transmission.
at NzbDrone.Core.Download.Clients.Transmission.TransmissionProxy.AuthenticateClient (NzbDrone.Common.Http.HttpRequestBuilder requestBuilder, NzbDrone.Core.Download.Clients.Transmission.TransmissionSettings settings, System.Boolean reauthenticate) [0x000b9] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Download\Clients\Transmission\TransmissionProxy.cs:237
at NzbDrone.Core.Download.Clients.Transmission.TransmissionProxy.ProcessRequest (System.String action, System.Object arguments, NzbDrone.Core.Download.Clients.Transmission.TransmissionSettings settings) [0x0001f] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Download\Clients\Transmission\TransmissionProxy.cs:256
at NzbDrone.Core.Download.Clients.Transmission.TransmissionProxy.GetSessionVariables (NzbDrone.Core.Download.Clients.Transmission.TransmissionSettings settings) [0x00000] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Download\Clients\Transmission\TransmissionProxy.cs:143
at NzbDrone.Core.Download.Clients.Transmission.TransmissionProxy.GetConfig (NzbDrone.Core.Download.Clients.Transmission.TransmissionSettings settings) [0x00000] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Download\Clients\Transmission\TransmissionProxy.cs:117
at NzbDrone.Core.Download.Clients.Transmission.TransmissionProxy.GetClientVersion (NzbDrone.Core.Download.Clients.Transmission.TransmissionSettings settings) [0x00000] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Download\Clients\Transmission\TransmissionProxy.cs:109
at NzbDrone.Core.Download.Clients.Transmission.Transmission.ValidateVersion () [0x00000] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Download\Clients\Transmission\Transmission.cs:28
at NzbDrone.Core.Download.Clients.Transmission.TransmissionBase.TestConnection () [0x00000] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Download\Clients\Transmission\TransmissionBase.cs:236

Any ideas on what I could be missing here?

Wrong username and password is the most obvious, assuming the transmission web API is working properly.

Please post the requested debug logs somewhere and link them here.

Hi Markus101,
Thanks for your help.
Here is the link:
https://paste.ubuntu.com/p/4ztMh6CsRT/

You need to enable debug logging first, though might as well go with setting it to trace logging and upload both files when testing the transmission client.

Here the link of sonarr.debug.txt:
https://paste.ubuntu.com/p/mVMSyKy26S/

Hi Markus,
I don’t know if this is related with access right.
I see in “Disk Space” location of external drive “Seedbox”
And I can’t select it in “Root folders”
However “Seedbox” has access right following:
drwxrwxrwx 85 root root

Please put up the trace logs as well, that’ll show the response from transmission as well.

The logs should indicate why.