v2.9.0.16 Mono certificaat-fout bij downloaden

[barrypooter]

Met de GTK versie 2.9.0.16 (via Mono op MacOS) krijg ik de volgende error wanneer ik een video van GoPlay probeer te downloaden:

Unable to decode certificate.
[  at System.Security.Cryptography.X509Certificates.X509Certificate2ImplMono..ctor (System.Byte[] rawData, Microsoft.Win32.SafeHandles.SafePasswordHandle password, System.Security.Cryptography.X509Certificates.X509KeyStorageFlags keyStorageFlags) [0x00051] in <bc69ad8632744cfba18f9705e53c6302>:0
  at Mono.X509PalImpl.ImportFallback (System.Byte[] data, Microsoft.Win32.SafeHandles.SafePasswordHandle password, System.Security.Cryptography.X509Certificates.X509KeyStorageFlags keyStorageFlags) [0x00000] in <bc69ad8632744cfba18f9705e53c6302>:0
  at Mono.SystemCertificateProvider.Import (System.Byte[] data, Microsoft.Win32.SafeHandles.SafePasswordHandle password, System.Security.Cryptography.X509Certificates.X509KeyStorageFlags keyStorageFlags, Mono.CertificateImportFlags importFlags) [0x00033] in <bc69ad8632744cfba18f9705e53c6302>:0
  at Mono.SystemCertificateProvider.Mono.ISystemCertificateProvider.Import (System.Byte[] data, Microsoft.Win32.SafeHandles.SafePasswordHandle password, System.Security.Cryptography.X509Certificates.X509KeyStorageFlags keyStorageFlags, Mono.CertificateImportFlags importFlags) [0x00000] in <bc69ad8632744cfba18f9705e53c6302>:0
  at System.Security.Cryptography.X509Certificates.X509Helper.Import (System.Byte[] rawData, Microsoft.Win32.SafeHandles.SafePasswordHandle password, System.Security.Cryptography.X509Certificates.X509KeyStorageFlags keyStorageFlags) [0x00005] in <ba70b91736bd40cb990a357097dba9c3>:0
  at System.Security.Cryptography.X509Certificates.X509Certificate..ctor (System.String fileName, System.String password, System.Security.Cryptography.X509Certificates.X509KeyStorageFlags keyStorageFlags) [0x0003e] in <ba70b91736bd40cb990a357097dba9c3>:0
  at System.Security.Cryptography.X509Certificates.X509Certificate..ctor (System.String fileName) [0x00000] in <ba70b91736bd40cb990a357097dba9c3>:0
  at System.Security.Cryptography.X509Certificates.X509Certificate.CreateFromSignedFile (System.String filename) [0x00000] in <ba70b91736bd40cb990a357097dba9c3>:0
  at GemistDownloader.ManualLinksSearch.GetGenerator (GemistDownloader.GDWindow form) [0x00024] in <98c6b5f16cdc4f7681070a5068e69648>:0 ]

Is dit iets dat ik zelf kan oplossen?