Error during Paya Connect Desktop start on workstation

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Hi, We are running sage 100 2016.  On one of our windows 10 workstations we get Microsoft .NET error window, with the following error code just when Paya Connect Desktop begins to start.  Any help is much appreciated

Microsoft .NET Framework Error


See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text **************
System.InvalidOperationException: There is an error in XML document (0, 0). ---> System.Xml.XmlException: Root element is missing.
at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
at System.Xml.XmlTextReaderImpl.Read()
at System.Xml.XmlTextReader.Read()
at System.Xml.XmlReader.MoveToContent()
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderSettings.Read4_Settings()
--- End of inner exception stack trace ---
at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
at System.Xml.Serialization.XmlSerializer.Deserialize(TextReader textReader)
at CommonCL.Serializer`1.FromString(String constructorString)
at CommonCL.Settings.Load()
at SPSNet.frmMain.frmMain_Load(Object sender, EventArgs e)
at System.Windows.Forms.Form.OnLoad(EventArgs e)
at System.Windows.Forms.Form.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
************** Loaded Assemblies **************
mscorlib
Assembly Version: 4.0.0.0
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
----------------------------------------
SageExchange
Assembly Version: 2.0.2.81
Win32 Version: 2.0.2.81
CodeBase: file:///C:/Program%20Files%20(x86)/Sage%20Payment%20Solutions/Application%20Deployment/Applications/26A46608D5AA4BF6BA5D5EEA1376D09A/2.0.2.81/SageExchange.exe
----------------------------------------
System
Assembly Version: 4.0.0.0
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Windows.Forms
Assembly Version: 4.0.0.0
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
Assembly Version: 4.0.0.0
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
CommonCtrlCL
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Program%20Files%20(x86)/Sage%20Payment%20Solutions/Application%20Deployment/Applications/26A46608D5AA4BF6BA5D5EEA1376D09A/2.0.2.81/CommonCtrlCL.DLL
----------------------------------------
CommonCL
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Program%20Files%20(x86)/Sage%20Payment%20Solutions/Application%20Deployment/Applications/26A46608D5AA4BF6BA5D5EEA1376D09A/2.0.2.81/CommonCL.DLL
----------------------------------------
SPS.CardPresent.Terminals
Assembly Version: 5.0.12.0
Win32 Version: 5.0.12.0
CodeBase: file:///C:/Program%20Files%20(x86)/Sage%20Payment%20Solutions/Application%20Deployment/Applications/26A46608D5AA4BF6BA5D5EEA1376D09A/2.0.2.81/SPS.CardPresent.Terminals.DLL
----------------------------------------
System.Configuration
Assembly Version: 4.0.0.0
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Core
Assembly Version: 4.0.0.0
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
System.Xml
Assembly Version: 4.0.0.0
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
SPS.CardPresent.API
Assembly Version: 1.12.39.0
Win32 Version: 1.12.39.0
CodeBase: file:///C:/Program%20Files%20(x86)/Sage%20Payment%20Solutions/Application%20Deployment/Applications/26A46608D5AA4BF6BA5D5EEA1376D09A/2.0.2.81/SPS.CardPresent.API.DLL
----------------------------------------
UninstallSED1
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Program%20Files%20(x86)/Sage%20Payment%20Solutions/Application%20Deployment/Applications/26A46608D5AA4BF6BA5D5EEA1376D09A/2.0.2.81/UninstallSED1.DLL
----------------------------------------
CreditCardCtrlCL
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Program%20Files%20(x86)/Sage%20Payment%20Solutions/Application%20Deployment/Applications/26A46608D5AA4BF6BA5D5EEA1376D09A/2.0.2.81/CreditCardCtrlCL.DLL
----------------------------------------
VirtualCheckCtrlCL
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Program%20Files%20(x86)/Sage%20Payment%20Solutions/Application%20Deployment/Applications/26A46608D5AA4BF6BA5D5EEA1376D09A/2.0.2.81/VirtualCheckCtrlCL.DLL
----------------------------------------
clSedApi
Assembly Version: 2.0.0.1
Win32 Version: 2.0.0.1
CodeBase: file:///C:/Program%20Files%20(x86)/Sage%20Payment%20Solutions/Application%20Deployment/Applications/26A46608D5AA4BF6BA5D5EEA1376D09A/2.0.2.81/clSedApi.DLL
----------------------------------------
CommonCL.XmlSerializers
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Program%20Files%20(x86)/Sage%20Payment%20Solutions/Application%20Deployment/Applications/26A46608D5AA4BF6BA5D5EEA1376D09A/2.0.2.81/CommonCL.XmlSerializers.DLL
----------------------------------------
System.Web.Services
Assembly Version: 4.0.0.0
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Web.Services/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Web.Services.dll
----------------------------------------
Microsoft.GeneratedCode
Assembly Version: 1.0.0.0
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.
For example:
<configuration>
<system.windows.forms jitDebugging="true" />
</configuration>
When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.