13:08:14 - [BASE HTTP SERVER]: HandleRequest() threw System.Net.WebException: Error getting response stream (Write: The authentication or decryption has failed.): SendFailure ---> System.IO.IOException: The authentication or decryption has failed. ---> Mono.Security.Protocol.Tls.TlsException: Invalid certificate received from server. Error code: 0xffffffff800b010f
  at Mono.Security.Protocol.Tls.Handshake.Client.TlsServerCertificate.validateCertificates (Mono.Security.X509.X509CertificateCollection certificates) [0x000a1] in /usr/src/packages/BUILD/mono-2.10.2/mcs/class/Mono.Security/Mono.Security.Protocol.Tls.Handshake.Client/TlsServerCertificate.cs:218
  at Mono.Security.Protocol.Tls.Handshake.Client.TlsServerCertificate.ProcessAsTls1 () [0x00054] in /usr/src/packages/BUILD/mono-2.10.2/mcs/class/Mono.Security/Mono.Security.Protocol.Tls.Handshake.Client/TlsServerCertificate.cs:105
  at Mono.Security.Protocol.Tls.Handshake.HandshakeMessage.Process () [0x00037] in /usr/src/packages/BUILD/mono-2.10.2/mcs/class/Mono.Security/Mono.Security.Protocol.Tls.Handshake/HandshakeMessage.cs:105
  at (wrapper remoting-invoke-with-check) Mono.Security.Protocol.Tls.Handshake.HandshakeMessage:Process ()
  at Mono.Security.Protocol.Tls.ClientRecordProtocol.ProcessHandshakeMessage (Mono.Security.Protocol.Tls.TlsStream handMsg) [0x00039] in /usr/src/packages/BUILD/mono-2.10.2/mcs/class/Mono.Security/Mono.Security.Protocol.Tls/ClientRecordProtocol.cs:81
  at Mono.Security.Protocol.Tls.RecordProtocol.InternalReceiveRecordCallback (IAsyncResult asyncResult) [0x00127] in /usr/src/packages/BUILD/mono-2.10.2/mcs/class/Mono.Security/Mono.Security.Protocol.Tls/RecordProtocol.cs:397
  --- End of inner exception stack trace ---
  at Mono.Security.Protocol.Tls.SslStreamBase.AsyncHandshakeCallback (IAsyncResult asyncResult) [0x0002a] in /usr/src/packages/BUILD/mono-2.10.2/mcs/class/Mono.Security/Mono.Security.Protocol.Tls/SslStreamBase.cs:102
  --- End of inner exception stack trace ---
  at System.Net.HttpWebRequest.EndGetRequestStream (IAsyncResult asyncResult) [0x0004c] in /usr/src/packages/BUILD/mono-2.10.2/mcs/class/System/System.Net/HttpWebRequest.cs:736
  at System.Net.HttpWebRequest.GetRequestStream () [0x00057] in /usr/src/packages/BUILD/mono-2.10.2/mcs/class/System/System.Net/HttpWebRequest.cs:751
  at PayPal.PayPalModule.IPN (System.Collections.Hashtable request) [0x000d5] in /home/opensim/lib/develop/opensim/addon-modules/mod-paypal/Modules/PayPalModule.cs:392
  at OpenSim.Framework.Servers.HttpServer.BaseHttpServer.HandleContentVerbs (OpenSim.Framework.Servers.HttpServer.OSHttpRequest request, OpenSim.Framework.Servers.HttpServer.OSHttpResponse response) [0x001f1] in /home/opensim/lib/develop/opensim/OpenSim/Framework/Servers/HttpServer/BaseHttpServer.cs:1433
  at OpenSim.Framework.Servers.HttpServer.BaseHttpServer.HandleHTTPRequest (OpenSim.Framework.Servers.HttpServer.OSHttpRequest request, OpenSim.Framework.Servers.HttpServer.OSHttpResponse response) [0x00059] in /home/opensim/lib/develop/opensim/OpenSim/Framework/Servers/HttpServer/BaseHttpServer.cs:1336
  at OpenSim.Framework.Servers.HttpServer.BaseHttpServer.HandleRequest (OpenSim.Framework.Servers.HttpServer.OSHttpRequest request, OpenSim.Framework.Servers.HttpServer.OSHttpResponse response) [0x00492] in /home/opensim/lib/develop/opensim/OpenSim/Framework/Servers/HttpServer/BaseHttpServer.cs:612