Je n'ai pas le message d'erreur évoqué, juste ça, après un reboot du NAS :
05/06/2020 16:16:05.875 1000 Info Loading configuration file /volume1/LTEHMonitor/LTEHMonitor.xml
05/06/2020 16:16:17.228 1179 Info Got CSRF session token
05/06/2020 16:16:17.852 1159 Error Can't process router response (for :81/api/hme.xml)
System.Net.WebException: Error: ConnectFailure (Connection refused) ---> System.Net.Sockets.SocketException: Connection refused
at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP) [0x000d1] in <5071a6e4a4564e19a2eda0f53e42f9bd>:0
at System.Net.WebConnection.Connect (System.Net.HttpWebRequest request) [0x0019b] in <5071a6e4a4564e19a2eda0f53e42f9bd>:0
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.EndGetResponse (System.IAsyncResult asyncResult) [0x00064] in <5071a6e4a4564e19a2eda0f53e42f9bd>:0
at System.Net.HttpWebRequest.GetResponse () [0x0000e] in <5071a6e4a4564e19a2eda0f53e42f9bd>:0
at LTEHMonitor.HRouter. (System.Net.HttpWebRequest , System.Boolean , System.String ) [0x00000] in <2ef26f4de9d14e02aed95121bc9af9d2>:0
05/06/2020 16:16:26.236 1100 Info Tick 0
05/06/2020 16:16:27.887 1111 Info Updating session token
05/06/2020 16:16:27.895 1179 Info Got CSRF session token
05/06/2020 16:16:28.120 1113 Info Getting public IP
05/06/2020 16:16:28.477 1179 Info Got CSRF session token
05/06/2020 16:16:28.904 1001 Info Saving configuration file /volume1/LTEHMonitor/LTEHMonitor.xml
05/06/2020 16:16:29.062 1191 Info ExecuteCommand: 'VpnOn'
05/06/2020 16:16:29.095 1179 Info Got CSRF session token
05/06/2020 16:16:29.185 1191 Info ExecuteCommand: 'SendSms:06xxxxxxxx:LTE H-Monitor sur DS214'
05/06/2020 16:16:29.285 1179 Info Got CSRF session token
05/06/2020 16:16:30.900 1100 Info Tick 1
05/06/2020 16:16:31.418 1100 Info Tick 2
05/06/2020 16:16:31.928 1100 Info Tick 3
05/06/2020 16:16:32.438 1100 Info Tick 4
05/06/2020 16:16:32.948 1100 Info Tick 5
05/06/2020 16:16:33.458 1100 Info Tick 6
05/06/2020 16:16:33.968 1100 Info Tick 7
05/06/2020 16:16:34.488 1100 Info Tick 8
05/06/2020 16:16:34.998 1100 Info Tick 9
05/06/2020 16:16:35.509 1100 Info Tick 10
05/06/2020 16:16:35.553 1102 Info Auto reload config
05/06/2020 16:16:36.242 1000 Info Loading configuration file /volume1/LTEHMonitor/LTEHMonitor.xml
05/06/2020 16:16:36.508 1100 Info Tick 11
05/06/2020 16:16:37.018 1100 Info Tick 12
....
Te prends pas la tête ;)