Having the exact the same problem! Trying to upload my contribution to the rotary competition...
Server Error in '/' Application.
Unknown error (0xfffffffe)
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ComponentModel.Win32Exception: Unknown error (0xfffffffe)
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
Server Error in '/' Application.
Unknown error (0xfffffffe)
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ComponentModel.Win32Exception: Unknown error (0xfffffffe)
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[Win32Exception (0x80004005): Unknown error (0xfffffffe)]
System.Diagnostics.Process.StartWithShellExecuteEx(ProcessStartInfo startInfo) +912
System.Diagnostics.Process.Start() +136
System.Diagnostics.Process.Start(ProcessStartInfo startInfo) +49
Arcade.UploadFunctions.minifyC2Runtime(Int32 GameID) +347
Arcade.GameFunctions.createGame(Int32 CatID, String Name, String Description, String Instructions, Int32 UserId, Int32 Width, Int32 Height, Int32 ParentGameID) +1344
ArcadeSubmit.submitGame(Object sender, EventArgs e) +1326
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272