myrtille: Myrtille does not connect to a remote session

My RDS environment with Myrtille was working properly, but after I rebooted to apply the Windows Server Update (KB4088787 - Security Patch) Myrtille stopped working.

I checked the Myrtille.Services.log file and it apparently does not show any errors:

2018-03-14 07:45:06,414 [4] INFO  System.Diagnostics redirection [(null)] - Service: Myrtille.Services.RemoteSessionProcess
2018-03-14 07:45:06,445 [4] INFO  System.Diagnostics redirection [(null)] - Endpoint: WSDualHttpBinding_IRemoteSessionProcess
2018-03-14 07:45:06,445 [4] INFO  System.Diagnostics redirection [(null)] - Address: http://localhost:8080/Myrtille/RemoteSessionProcess
2018-03-14 07:45:06,445 [4] INFO  System.Diagnostics redirection [(null)] - Binding: WSDualHttpBinding
2018-03-14 07:45:06,445 [4] INFO  System.Diagnostics redirection [(null)] - Contract: Myrtille.Services.Contracts.IRemoteSessionProcess
2018-03-14 07:45:06,445 [4] INFO  System.Diagnostics redirection [(null)] - 
2018-03-14 07:45:06,445 [4] INFO  System.Diagnostics redirection [(null)] - Service: Myrtille.Services.FileStorage
2018-03-14 07:45:06,445 [4] INFO  System.Diagnostics redirection [(null)] - Endpoint: BasicHttpBinding_IFileStorage
2018-03-14 07:45:06,445 [4] INFO  System.Diagnostics redirection [(null)] - Address: http://localhost:8080/Myrtille/FileStorage
2018-03-14 07:45:06,445 [4] INFO  System.Diagnostics redirection [(null)] - Binding: BasicHttpBinding
2018-03-14 07:45:06,445 [4] INFO  System.Diagnostics redirection [(null)] - Contract: Myrtille.Services.Contracts.IFileStorage
2018-03-14 07:45:06,445 [4] INFO  System.Diagnostics redirection [(null)] - 
2018-03-14 07:45:34,862 [5] INFO  System.Diagnostics redirection [(null)] - Started remote session 1
2018-03-14 07:45:50,676 [5] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 1
2018-03-14 07:47:13,738 [4] INFO  System.Diagnostics redirection [(null)] - Service: Myrtille.Services.RemoteSessionProcess
2018-03-14 07:47:13,769 [4] INFO  System.Diagnostics redirection [(null)] - Endpoint: WSDualHttpBinding_IRemoteSessionProcess
2018-03-14 07:47:13,769 [4] INFO  System.Diagnostics redirection [(null)] - Address: http://localhost:8080/Myrtille/RemoteSessionProcess
2018-03-14 07:47:13,769 [4] INFO  System.Diagnostics redirection [(null)] - Binding: WSDualHttpBinding
2018-03-14 07:47:13,769 [4] INFO  System.Diagnostics redirection [(null)] - Contract: Myrtille.Services.Contracts.IRemoteSessionProcess
2018-03-14 07:47:13,769 [4] INFO  System.Diagnostics redirection [(null)] - 
2018-03-14 07:47:13,785 [4] INFO  System.Diagnostics redirection [(null)] - Service: Myrtille.Services.FileStorage
2018-03-14 07:47:13,785 [4] INFO  System.Diagnostics redirection [(null)] - Endpoint: BasicHttpBinding_IFileStorage
2018-03-14 07:47:13,785 [4] INFO  System.Diagnostics redirection [(null)] - Address: http://localhost:8080/Myrtille/FileStorage
2018-03-14 07:47:13,785 [4] INFO  System.Diagnostics redirection [(null)] - Binding: BasicHttpBinding
2018-03-14 07:47:13,785 [4] INFO  System.Diagnostics redirection [(null)] - Contract: Myrtille.Services.Contracts.IFileStorage
2018-03-14 07:47:13,785 [4] INFO  System.Diagnostics redirection [(null)] - 
2018-03-14 07:49:12,712 [8] INFO  System.Diagnostics redirection [(null)] - Started remote session 2
2018-03-14 07:49:28,663 [11] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 2
2018-03-14 07:51:13,182 [12] INFO  System.Diagnostics redirection [(null)] - Started remote session 3
2018-03-14 07:51:13,741 [6] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 3
2018-03-14 07:51:39,804 [11] INFO  System.Diagnostics redirection [(null)] - Started remote session 4
2018-03-14 07:51:40,330 [11] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 4
2018-03-14 07:52:27,948 [15] INFO  System.Diagnostics redirection [(null)] - Started remote session 5
2018-03-14 07:52:28,484 [6] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 5
2018-03-14 07:54:42,846 [16] INFO  System.Diagnostics redirection [(null)] - Started remote session 6
2018-03-14 07:54:58,293 [17] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 6
2018-03-14 07:56:19,509 [19] INFO  System.Diagnostics redirection [(null)] - Started remote session 7
2018-03-14 07:56:20,478 [20] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 7
2018-03-14 07:57:15,361 [22] INFO  System.Diagnostics redirection [(null)] - Started remote session 8
2018-03-14 07:57:16,321 [22] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 8
2018-03-14 07:59:56,680 [23] INFO  System.Diagnostics redirection [(null)] - Started remote session 9
2018-03-14 07:59:57,615 [24] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 9
2018-03-14 08:00:11,049 [20] INFO  System.Diagnostics redirection [(null)] - Started remote session 10
2018-03-14 08:00:11,191 [20] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 10
2018-03-14 08:01:27,406 [22] INFO  System.Diagnostics redirection [(null)] - Started remote session 11
2018-03-14 08:01:27,978 [21] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 11
2018-03-14 08:01:53,611 [24] INFO  System.Diagnostics redirection [(null)] - Started remote session 12
2018-03-14 08:01:54,132 [19] INFO  System.Diagnostics redirection [(null)] - Stopped remote session 12

The Myrtille.Web.log file is already displaying the following error:

2018-03-14 08:01:52,770 [61] ERROR System.Diagnostics redirection [(null)] - Failed to create remote session (System.FormatException: Input string was not in a correct format.
   at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   at Myrtille.Web.Default.ConnectButtonClick(Object sender, EventArgs e))

I am informing the credentials correctly, but I can no longer access through Myrtille, but using RDWeb and downloading the RDP file is working properly. Not whether the Windows update has generated the problem or not.

Another point that I checked, is that from time to time is happening the following error in the windows event log, but I do not know if there is a relation:

Anyone have any idea what’s going on?