Any idea as to what might be causing this error in my setup of PayPal Express Checkout? The path in the error message is interesting, as this is not the path of the application on the web server.
LongMessage: Security header is not valid
ShortMessage: Security error
ErrorCode: 10002
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: NopSolutions.NopCommerce.Common.NopException:
LongMessage: Security header is not valid
ShortMessage: Security error
ErrorCode: 10002
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:
[NopException:
LongMessage: Security header is not valid
ShortMessage: Security error
ErrorCode: 10002
]
NopSolutions.NopCommerce.Payment.Methods.PayPal.PayPalExpressPaymentProcessor.SetExpressCheckout(Decimal OrderTotal, String ReturnURL, String CancelURL) in C:\Users\John xxxxx.VISITUSAT\Desktop\NopCommerce\Payment\Nop.Payment.PayPal\PayPalExpressPaymentProcessor.cs:209
NopSolutions.NopCommerce.Web.Modules.PaypalExpressButton.btnPaypalExpress_Click(Object sender, EventArgs e) in C:\Users\John xxxx.VISITUSAT\Desktop\NopCommerce\NopCommerceStore\Modules\PaypalExpressButton.ascx.cs:80
System.Web.UI.ImageClickEventHandler.Invoke(Object sender, ImageClickEventArgs e) +0
System.Web.UI.WebControls.ImageButton.OnClick(ImageClickEventArgs e) +98
System.Web.UI.WebControls.ImageButton.RaisePostBackEvent(String eventArgument) +161
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +29
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2981
--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:2.0.50727.3074; ASP.NET Version:2.0.50727.4049