Uhandled exception has occurred in your application แก้ยังไงครับ ลองมาแล้ววิธีแล้วแต่ก็ไม่ได้

See the end of this message for details on invoking 
just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text **************
System.Net.WebException: The remote server returned an error: (404) Not Found.
   at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request)
   at System.Net.WebClient.DownloadString(Uri address)
   at System.Net.WebClient.DownloadString(String address)
   at WeAreDevs_API.ExploitAPI.IsUpdated()
   at WeAreDevs_API.ExploitAPI.LaunchExploit()
   at (Object )
   at ꁩ�輘鴾ᾡ㡿팃分.띾鳔ࣜ䥃났蒓塸屏(Object )
   at iSkyMaster.Form2.⵱킼ᩈ队쁸涤큱盂(Object 犋Ჹ렬Ⱚ극萋煚斃, EventArgs 獻ᶣ氆䴳១Ƛ＿)
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.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: 4.8.3928.0 built by: NET48REL1
    CodeBase: file:///D:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
----------------------------------------
iSkyMaster
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///D:/Users/Oke/Desktop/iSkyMaster%20V.1.3/iSkyMaster.exe
----------------------------------------
System
    Assembly Version: 4.0.0.0
    Win32 Version: 4.8.3928.0 built by: NET48REL1
    CodeBase: file:///D:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
曹ᦿ脿㡮딊듩⊝郙
    Assembly Version: 0.0.65535.65535
    Win32 Version: 1.0.0.0
    CodeBase: file:///D:/Users/Oke/Desktop/iSkyMaster%20V.1.3/iSkyMaster.exe
----------------------------------------
巁歡ᷪ⫷ᗱ퉬躦
    Assembly Version: 0.0.65535.65535
    Win32 Version: 1.0.0.0
    CodeBase: file:///D:/Users/Oke/Desktop/iSkyMaster%20V.1.3/iSkyMaster.exe
----------------------------------------
System.Windows.Forms
    Assembly Version: 4.0.0.0
    Win32 Version: 4.8.3928.0 built by: NET48REL1
    CodeBase: file:///D:/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: 4.8.3761.0 built by: NET48REL1
    CodeBase: file:///D:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Configuration
    Assembly Version: 4.0.0.0
    Win32 Version: 4.8.3761.0 built by: NET48REL1
    CodeBase: file:///D:/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: 4.8.3928.0 built by: NET48REL1
    CodeBase: file:///D:/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: 4.8.3761.0 built by: NET48REL1
    CodeBase: file:///D:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
FlatUI
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///D:/Users/Oke/Desktop/iSkyMaster%20V.1.3/FlatUI.DLL
----------------------------------------
WeAreDevs_API
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///D:/Users/Oke/Desktop/iSkyMaster%20V.1.3/WeAreDevs_API.DLL
----------------------------------------
FastColoredTextBox
    Assembly Version: 2.16.23.0
    Win32 Version: 2.16.23.0
    CodeBase: file:///D:/Users/Oke/Desktop/iSkyMaster%20V.1.3/FastColoredTextBox.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.