That sounds to me like the API key or however you login to your indexer is not authenticated or working anymore, can you test the connection with your indexer(s)?
Giving a bit more information about the error or logs would help (what is the text that sonarr displays when the cloud turns red ?)
This is exactly what is displayed when it turns red
tested my indexers with no problems
these are the logs
16-3-17 02:56:29.8|Warn|DownloadMonitoringService|Unable to retrieve queue and history items from utorrent
[v2.0.0.3969] NzbDrone.Common.Http.HttpException: HTTP request failed: [400:BadRequest] [GET] at [http://localhost:49587/gui/token.html]
at NzbDrone.Common.Http.HttpClient.Execute(HttpRequest request) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Common\Http\HttpClient.cs:line 102
at NzbDrone.Core.Download.Clients.UTorrent.UTorrentProxy.AuthenticateClient(HttpRequestBuilder requestBuilder, UTorrentSettings settings, Boolean reauthenticate) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrentProxy.cs:line 233
at NzbDrone.Core.Download.Clients.UTorrent.UTorrentProxy.ProcessRequest(HttpRequestBuilder requestBuilder, UTorrentSettings settings) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrentProxy.cs:line 170
at NzbDrone.Core.Download.Clients.UTorrent.UTorrentProxy.GetTorrents(UTorrentSettings settings) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrentProxy.cs:line 78
at NzbDrone.Core.Download.Clients.UTorrent.UTorrent.GetItems() in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrent.cs:line 80
at NzbDrone.Core.Download.TrackedDownloads.DownloadMonitoringService.ProcessClientDownloads(IDownloadClient downloadClient) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\TrackedDownloads\DownloadMonitoringService.cs:line 86
invalid request
16-3-17 02:57:59.9|Warn|HttpClient|HTTP Error - Res: [GET] http://localhost:49587/gui/token.html : 400.BadRequest
16-3-17 02:57:59.9|Warn|DownloadMonitoringService|Unable to retrieve queue and history items from utorrent
[v2.0.0.3969] NzbDrone.Common.Http.HttpException: HTTP request failed: [400:BadRequest] [GET] at [http://localhost:49587/gui/token.html]
at NzbDrone.Common.Http.HttpClient.Execute(HttpRequest request) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Common\Http\HttpClient.cs:line 102
at NzbDrone.Core.Download.Clients.UTorrent.UTorrentProxy.AuthenticateClient(HttpRequestBuilder requestBuilder, UTorrentSettings settings, Boolean reauthenticate) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrentProxy.cs:line 233
at NzbDrone.Core.Download.Clients.UTorrent.UTorrentProxy.ProcessRequest(HttpRequestBuilder requestBuilder, UTorrentSettings settings) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrentProxy.cs:line 170
at NzbDrone.Core.Download.Clients.UTorrent.UTorrentProxy.GetTorrents(UTorrentSettings settings) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrentProxy.cs:line 78
at NzbDrone.Core.Download.Clients.UTorrent.UTorrent.GetItems() in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrent.cs:line 80
at NzbDrone.Core.Download.TrackedDownloads.DownloadMonitoringService.ProcessClientDownloads(IDownloadClient downloadClient) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\TrackedDownloads\DownloadMonitoringService.cs:line 86
invalid request
16-3-17 02:59:29.9|Warn|HttpClient|HTTP Error - Res: [GET] http://localhost:49587/gui/token.html : 400.BadRequest
16-3-17 02:59:30.0|Warn|DownloadMonitoringService|Unable to retrieve queue and history items from utorrent
[v2.0.0.3969] NzbDrone.Common.Http.HttpException: HTTP request failed: [400:BadRequest] [GET] at [http://localhost:49587/gui/token.html]
at NzbDrone.Common.Http.HttpClient.Execute(HttpRequest request) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Common\Http\HttpClient.cs:line 102
at NzbDrone.Core.Download.Clients.UTorrent.UTorrentProxy.AuthenticateClient(HttpRequestBuilder requestBuilder, UTorrentSettings settings, Boolean reauthenticate) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrentProxy.cs:line 233
at NzbDrone.Core.Download.Clients.UTorrent.UTorrentProxy.ProcessRequest(HttpRequestBuilder requestBuilder, UTorrentSettings settings) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrentProxy.cs:line 170
at NzbDrone.Core.Download.Clients.UTorrent.UTorrentProxy.GetTorrents(UTorrentSettings settings) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrentProxy.cs:line 78
at NzbDrone.Core.Download.Clients.UTorrent.UTorrent.GetItems() in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\Clients\uTorrent\UTorrent.cs:line 80
at NzbDrone.Core.Download.TrackedDownloads.DownloadMonitoringService.ProcessClientDownloads(IDownloadClient downloadClient) in m:\BuildAgent\work\6c3239faf2b92630\src\NzbDrone.Core\Download\TrackedDownloads\DownloadMonitoringService.cs:line 86
ok, and have you tested the connection to utorrent? Because it seems Sonarr can’t authenticate with that one anymore, maybe the indexer works fine, but the API towards utorrent can’t properly work right now, can you test that one?
go through the settings of your utorrent, maybe the api key failed and sonarr needs the new one, maybe an update changed something, double check your login settings for utorrent, if you can’t manage to get it working, post some screens so we can try to help
you are right, it seems to be configured well, maybe the api towards µtorrent changed and the api call is not working anymore, might be a bug then… But @Taloth or @markus101 are way more qualified to answer that one