TS3AudioBot: TS3AudioBot crashed

2019-03-29 13:54:02.8731| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/39/(/play/https%3A%2F%2Fstream01.reyfm.de%2Fwarzone_192kbps.mp3
2019-03-29 13:54:02.9340| WARN|WebWrapper.ToLoggedError Web error: [404] NotFound
System.Net.WebException: The remote server returned an error: (404) File Not Found.
  at System.Net.HttpWebRequest.GetResponseFromData (System.Net.WebResponseStream stream, System.Threading.CancellationToken cancellationToken) [0x00146] in <99508e34019346e68bffacfcecbd997e>:0 
  at System.Net.HttpWebRequest.RunWithTimeoutWorker[T] (System.Threading.Tasks.Task`1[TResult] workerTask, System.Int32 timeout, System.Action abort, System.Func`1[TResult] aborted, System.Threading.CancellationTokenSource cts) [0x000f8] in <99508e34019346e68bffacfcecbd997e>:0 
  at System.Net.HttpWebRequest.GetResponse () [0x00016] in <99508e34019346e68bffacfcecbd997e>:0 
  at TS3AudioBot.Helper.WebWrapper.GetResponseUnsafe (System.Uri link, System.TimeSpan timeout) [0x0002b] in <ec8b5d279fbe45c7a57c68e05d6ad136>:0 
2019-03-29 13:54:07.4058| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onconnect/%21play%20https%3A%2F%2Fstream01.reyfm.de%2Fexclusive_192kbps.mp3
2019-03-29 13:54:07.4337| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onidle/%21play%20https%3A%2F%2Fstream01.reyfm.de%2Fexclusive_192kbps.mp3
2019-03-29 13:54:07.4615| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/39/(/play/https%3A%2F%2Fstream01.reyfm.de%2Fexclusive_192kbps.mp3
2019-03-29 13:54:30.4295| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onconnect/%21play%20https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dru1xdOo0LTg
2019-03-29 13:54:30.4573| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onidle/%21play%20https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dru1xdOo0LTg
2019-03-29 13:54:30.4856| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/39/(/play/https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dru1xdOo0LTg
2019-03-29 13:54:30.8807| WARN|WebWrapper.ToLoggedError Web error: [403] Forbidden
System.Net.WebException: The remote server returned an error: (403) Forbidden.
  at System.Net.HttpWebRequest.GetResponseFromData (System.Net.WebResponseStream stream, System.Threading.CancellationToken cancellationToken) [0x00146] in <99508e34019346e68bffacfcecbd997e>:0 
  at System.Net.HttpWebRequest.RunWithTimeoutWorker[T] (System.Threading.Tasks.Task`1[TResult] workerTask, System.Int32 timeout, System.Action abort, System.Func`1[TResult] aborted, System.Threading.CancellationTokenSource cts) [0x000f8] in <99508e34019346e68bffacfcecbd997e>:0 
  at System.Net.HttpWebRequest.GetResponse () [0x00016] in <99508e34019346e68bffacfcecbd997e>:0 
  at TS3AudioBot.Helper.WebWrapper.GetResponse (System.Uri link, System.Action`1[T] body, System.TimeSpan timeout) [0x0002b] in <ec8b5d279fbe45c7a57c68e05d6ad136>:0 
2019-03-29 13:54:39.9117| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onconnect/%21play%20https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DWxsvUjlrhK8
2019-03-29 13:54:39.9403| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onidle/%21play%20https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DWxsvUjlrhK8
2019-03-29 13:54:39.9687| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/39/(/play/https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DWxsvUjlrhK8
2019-03-29 13:54:54.5549| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onconnect/%21play%20https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DApISiGYJSvw
2019-03-29 13:54:54.5838| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onidle/%21play%20https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DApISiGYJSvw
2019-03-29 13:54:54.6213| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/39/(/play/https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DApISiGYJSvw
2019-03-29 13:55:13.9278| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onconnect/%21play%20https%3A%2F%2Fstream01.reyfm.de%2Fexclusive_192kbps.mp3
2019-03-29 13:55:13.9560| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onidle/%21play%20https%3A%2F%2Fstream01.reyfm.de%2Fexclusive_192kbps.mp3
2019-03-29 13:55:13.9843| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/39/(/play/https%3A%2F%2Fstream01.reyfm.de%2Fexclusive_192kbps.mp3
2019-03-29 13:55:17.1212| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onconnect/%21play%20https%3A%2F%2Fstream01.reyfm.de%2Fchillout_192kbps.mp3
2019-03-29 13:55:17.1493| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867592-liqMJo/events.onidle/%21play%20https%3A%2F%2Fstream01.reyfm.de%2Fchillout_192kbps.mp3
2019-03-29 13:55:17.1777| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/39/(/play/https%3A%2F%2Fstream01.reyfm.de%2Fchillout_192kbps.mp3
2019-03-29 13:55:24.8439| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/12/(/bot/info
2019-03-29 13:55:24.8910| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/get/1572-7-1553867556-w8s6nf/connect
2019-03-29 13:55:24.9190| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/12/(/song
2019-03-29 13:55:28.2305| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/12/(/volume/100
2019-03-29 13:55:33.3619| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867556-w8s6nf/events.onconnect/%21play%20https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DWxsvUjlrhK8
2019-03-29 13:55:33.3898| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/1572-7-1553867556-w8s6nf/events.onidle/%21play%20https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DWxsvUjlrhK8
2019-03-29 13:55:33.4178| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/12/(/play/https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DWxsvUjlrhK8
2019-03-29 13:56:19.7755| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/22/(/bot/info
2019-03-29 13:56:19.8235| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/get/1572-7-1553847481-Mf4Tqz/connect
2019-03-29 13:56:19.8519| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/22/(/song
2019-03-29 13:56:25.7126| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/22/(/bot/commander/on
2019-03-29 13:56:29.6596| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/22/(/bot/commander/on
2019-03-29 13:56:31.5354| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/22/(/pause
2019-03-29 13:56:31.7331| INFO|PlayManager.StopInternal Song queue ended: No next song could be played.
2019-03-29 13:56:32.4942| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/22/(/bot/commander/on
2019-03-29 13:56:34.3527| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/22/(/pause
2019-03-29 13:57:07.6525| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/342-7-1551198843-cAvFZL/events.onconnect/%21play%20https%3A%2F%2Fdg-wdr-https-fra-dtag-cdn.sslcast.addradio.de%2Fwdr%2F1live%2Fdiggi%2Fmp3%2F128%2Fstream.mp3
2019-03-29 13:57:07.6813| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/342-7-1551198843-cAvFZL/events.onidle/%21play%20https%3A%2F%2Fdg-wdr-https-fra-dtag-cdn.sslcast.addradio.de%2Fwdr%2F1live%2Fdiggi%2Fmp3%2F128%2Fstream.mp3
2019-03-29 13:57:07.7100| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/35/(/play/https%3A%2F%2Fdg-wdr-https-fra-dtag-cdn.sslcast.addradio.de%2Fwdr%2F1live%2Fdiggi%2Fmp3%2F128%2Fstream.mp3
2019-03-29 13:57:14.3367| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/342-7-1551198843-cAvFZL/events.onconnect/%21play%20http%3A%2F%2Fmp3.stream.tb-group.fm%2Fht.mp3%3F%2F%3F1550926717650.mp3
2019-03-29 13:57:14.3655| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/342-7-1551198843-cAvFZL/events.onidle/%21play%20http%3A%2F%2Fmp3.stream.tb-group.fm%2Fht.mp3%3F%2F%3F1550926717650.mp3
2019-03-29 13:57:14.3949| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/35/(/play/http%3A%2F%2Fmp3.stream.tb-group.fm%2Fht.mp3%3F%2F%3F1550926717650.mp3
2019-03-29 13:57:22.2920| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/342-7-1551198843-cAvFZL/events.onconnect/%21play%20http%3A%2F%2Fstream.laut.fm%2Fhappyfmnightscore
2019-03-29 13:57:22.3206| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/342-7-1551198843-cAvFZL/events.onidle/%21play%20http%3A%2F%2Fstream.laut.fm%2Fhappyfmnightscore
2019-03-29 13:57:22.3491| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/35/(/play/http%3A%2F%2Fstream.laut.fm%2Fhappyfmnightscore
2019-03-29 13:57:30.6058| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/342-7-1551198843-cAvFZL/events.onconnect/%21play%20http%3A%2F%2F195.201.81.101%2Ftop100station.mp3
2019-03-29 13:57:30.6422| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/set/342-7-1551198843-cAvFZL/events.onidle/%21play%20http%3A%2F%2F195.201.81.101%2Ftop100station.mp3
2019-03-29 13:57:30.6706| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/35/(/play/http%3A%2F%2F195.201.81.101%2Ftop100station.mp3
2019-03-29 13:57:48.8771| INFO|PlayManager.StopInternal Song queue ended: No next song could be played.
2019-03-29 13:58:00.8973| INFO|PlayManager.StopInternal Song queue ended: No next song could be played.
2019-03-29 13:58:09.3415| WARN|WebWrapper.ToLoggedError Web error: [403] Forbidden
System.Net.WebException: The remote server returned an error: (403) Forbidden.
  at System.Net.HttpWebRequest.GetResponseFromData (System.Net.WebResponseStream stream, System.Threading.CancellationToken cancellationToken) [0x00146] in <99508e34019346e68bffacfcecbd997e>:0 
  at System.Net.HttpWebRequest.RunWithTimeoutWorker[T] (System.Threading.Tasks.Task`1[TResult] workerTask, System.Int32 timeout, System.Action abort, System.Func`1[TResult] aborted, System.Threading.CancellationTokenSource cts) [0x000f8] in <99508e34019346e68bffacfcecbd997e>:0 
  at System.Net.HttpWebRequest.GetResponse () [0x00016] in <99508e34019346e68bffacfcecbd997e>:0 
  at TS3AudioBot.Helper.WebWrapper.GetResponse (System.Uri link, System.Action`1[T] body, System.TimeSpan timeout) [0x0002b] in <ec8b5d279fbe45c7a57c68e05d6ad136>:0 
2019-03-29 13:59:33.8785| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/22/(/bot/info
2019-03-29 13:59:33.9173| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/settings/bot/get/1572-7-1553847481-Mf4Tqz/connect
2019-03-29 13:59:33.9454| INFO|WebServer.EnterWebLoop 88.99.215.206 Requested: /api/bot/use/22/(/song
2019-03-29 14:00:24.6480|FATAL|Core.ExceptionHandler Critical program failure!
System.NullReferenceException: Object reference not set to an instance of an object
  at TS3AudioBot.Bot.TextCallback (System.Object sender, TS3Client.Messages.TextMessage textMessage) [0x0003d] in <ec8b5d279fbe45c7a57c68e05d6ad136>:0 
  at TS3AudioBot.Ts3Client.ExtendedTextMessage (System.Object sender, System.Collections.Generic.IEnumerable`1[T] eventArgs) [0x00036] in <ec8b5d279fbe45c7a57c68e05d6ad136>:0 
  at TS3Client.Full.Ts3FullClient.InvokeEvent (TS3Client.LazyNotification lazyNotification) [0x01b95] in <a225ff1eb0e64cada1ab79e513cfc249>:0 
  at TS3Client.DoubleThreadEventDispatcher.DispatchLoop () [0x0001f] in <a225ff1eb0e64cada1ab79e513cfc249>:0 
  at System.Threading.ThreadHelper.ThreadStart_Context (System.Object state) <0x7fcc37a14820 + 0x00084> in <61d5ec988156494684532710ebf1643d>:0 
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) <0x7fcc37a127f0 + 0x00171> in <61d5ec988156494684532710ebf1643d>:0 
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state) <0x7fcc37a127a0 + 0x00016> in <61d5ec988156494684532710ebf1643d>:0 
  at System.Threading.ThreadHelper.ThreadStart () <0x7fcc37a14930 + 0x00020> in <61d5ec988156494684532710ebf1643d>:0 
2019-03-29 14:00:24.6480| INFO|Core.Dispose TS3AudioBot shutting down.
2019-03-29 14:00:24.6501| INFO|Bot.Dispose Bot (0) disconnecting.
2019-03-29 14:00:24.6663| INFO|Bot.Dispose Bot (1) disconnecting.

What is the 403 error and how can it be fixed and the other one too? As a result, our systems go offline several times a day.