Error in GetRemoteFileTimeUTC routine for file ServerCheck.exe

We recently moved our Database from Server 2008 R2 to Server 2012 R2 and since then we have been unable to get our Server Updates with the below error:

Error info is Client found response content type of '', but expected 'text/xml'.
The request failed with an empty response.\ at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at ServerCheck.ServerCheckWeb.Service.getFileModTimeUTC(String strKey, String strFilename)
at ServerCheck.cl_Web.GetRemoteFiletimeUTC(String strfilename)
2/13/2018 7:26:18 PM - - Error in SendErrors routine, Error info is Client found response content type of '', but expected 'text/xml'.
The request failed with an empty response.\ at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at ServerCheck.ServerCheckWeb.Service.GathersCheckErrors(String strKey, String strServername, String strError)
at ServerCheck.cl_Web.SendErrors(String strServername, String strError)
2/13/2018 7:26:18 PM - - Error in SendErrors routine, Error info is Client found response content type of '', but expected 'text/xml'.
The request failed with an empty response.\ at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at ServerCheck.ServerCheckWeb.Service.GathersCheckErrors(String strKey, String strServername, String strError)
at ServerCheck.cl_Web.SendErrors(String strServername, String strError)
2/13/2018 7:26:18 PM - - Error in SendErrors routine, Error info is Client found response content type of '', but expected 'text/xml'.
The request failed with an empty response.\ at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at ServerCheck.ServerCheckWeb.Service.GathersCheckErrors(String strKey, String strServername, String strError)
at ServerCheck.cl_Web.SendErrors(String strServername, String strError)
2/13/2018 7:26:18 PM - - Error in SendErrors routine, Error info is Client found response content type of '', but expected 'text/xml'.
The request failed with an empty response.\ at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at ServerCheck.ServerCheckWeb.Service.GathersCheckErrors(String strKey, String strServername, String strError)
at ServerCheck.cl_Web.SendErrors(String strServername, String strError)

Looking at the Service.vb file to send the data:

Try
Dim conSQL As New SqlClient.SqlConnection

conSQL.ConnectionString = "Data Source=10.0.0.1;Initial Catalog=serverDB;User id = server1;password = server2009;Encrypt=yes;TrustServerCertificate=True"
If conSQL.State = ConnectionState.Closed Then
conSQL.Open()
End If
Dim commsql As New SqlClient.SqlCommand
commsql.Connection = conSQL
commsql.CommandText = "Select * from TSMAdditionalNodes where PrimaryServer='" & strServerName.ToUpper.Trim & "' OR SecondaryServer='" & strServerName.ToUpper.Trim & "'"

Dim datread As SqlClient.SqlDataReader
datread = commsql.ExecuteReader()

If datread.HasRows() Then
Do While datread.Read()
alDSMSchedLocation.Add(datread("DSMSchedLogLocation").ToString)
alClusterNodeName.Add(datread("SERVER_NAME").ToString)
Loop
End If

datread.Close()
conSQL.Close()

Not sure what the issue is, but hoping to get some advice/direction on my failed service.

Cheers,

Serge