There are a few other threads on this, due to qbit making a breaking change to their API In 3.3.13/3.3.14. You can downgrade to 3.3.12 for the time being.
Trace logs are the same as previous. Sonarr gets an “Ok.” string back from qBt, and decides that is an exception rather than success, so doesn’t proceed with applying the label.
17-7-23 17:48:48.0|Trace|Http|Req: 1552 [POST] /api/release
17-7-23 17:48:48.1|Trace|HttpClient|Req: [POST] http://192.168.0.11:9090/command/download: urls=magnet%3A%3Fxt%3Durn%3Abtih%3A815df124da9343d9324ffdeab7514d107f3fdef2%26dn%3DThe.Simpsons.S28E17.720p.HDTV.x264-AVS%5Brartv%5D%26tr%3Dhttp%3A%252F%252Ftracker.track…