Server Error in '/' Application.

---

[ReflectionTypeLoadException: Could not load types from assembly uWebshop.Payment.PayPal, Version=2.2.0.5, Culture=neutral, PublicKeyToken=null, errors:
Exception: System.TypeLoadException: Method 'HandlePaymentResponse' in type 'uWebshop.Payment.PayPal.PayPalPaymentResponseHandler' from assembly 'uWebshop.Payment.PayPal, Version=2.2.0.5, Culture=neutral, PublicKeyToken=null' does not have an implementation.
]
   Umbraco.Core.TypeFinder.GetTypesWithFormattedException(Assembly a) +569
   Umbraco.Core.TypeFinder.GetClasses(Type assignTypeFrom, IEnumerable`1 assemblies, Boolean onlyConcreteClasses, Func`2 additionalFilter) +713
   Umbraco.Core.TypeFinder.GetClasses(Type assignTypeFrom, IEnumerable`1 assemblies, Boolean onlyConcreteClasses, Func`2 additionalFilter) +1762
   Umbraco.Core.TypeFinder.FindClassesOfType(IEnumerable`1 assemblies, Boolean onlyConcreteClasses) +176
   Umbraco.Core.TypeFinder.FindClassesOfType(IEnumerable`1 assemblies) +84
   Umbraco.Core.<>c__DisplayClass41`1.<ResolveTypes>b__40() +130
   Umbraco.Core.PluginManager.LoadViaScanningAndUpdateCacheFile(TypeList typeList, TypeResolutionKind resolutionKind, Func`1 finder) +70
   Umbraco.Core.PluginManager.ResolveTypes(Func`1 finder, TypeResolutionKind resolutionType, Boolean cacheResult) +3348
   Umbraco.Core.PluginManager.ResolveTypes(Boolean cacheResult, IEnumerable`1 specificAssemblies) +229
   Umbraco.Core.PluginManager.ResolveApplicationStartupHandlers() +48
   Umbraco.Core.CoreBootManager.InitializeApplicationEventsResolver() +58
   Umbraco.Web.WebBootManager.InitializeApplicationEventsResolver() +29
   Umbraco.Core.CoreBootManager.Initialize() +438
   Umbraco.Web.WebBootManager.Initialize() +72
   Umbraco.Core.UmbracoApplicationBase.StartApplication(Object sender, EventArgs e) +152
   Umbraco.Core.UmbracoApplicationBase.Application_Start(Object sender, EventArgs e) +40

[HttpException (0x80004005): Could not load types from assembly uWebshop.Payment.PayPal, Version=2.2.0.5, Culture=neutral, PublicKeyToken=null, errors:
Exception: System.TypeLoadException: Method 'HandlePaymentResponse' in type 'uWebshop.Payment.PayPal.PayPalPaymentResponseHandler' from assembly 'uWebshop.Payment.PayPal, Version=2.2.0.5, Culture=neutral, PublicKeyToken=null' does not have an implementation.
]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +9936761
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +118
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +172
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +336
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +296

[HttpException (0x80004005): Could not load types from assembly uWebshop.Payment.PayPal, Version=2.2.0.5, Culture=neutral, PublicKeyToken=null, errors:
Exception: System.TypeLoadException: Method 'HandlePaymentResponse' in type 'uWebshop.Payment.PayPal.PayPalPaymentResponseHandler' from assembly 'uWebshop.Payment.PayPal, Version=2.2.0.5, Culture=neutral, PublicKeyToken=null' does not have an implementation.
]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9915300
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +101
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +254