EPiServer.Find.Commerce 10.1.2 Unable to Load One or More of the Requested Types

Hello,

We are trying to upgrade to EPiServer 11.  We got to the point of being able to update the database, but then receive the below message after that occurs.

Server Error in '/' Application.
Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
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.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
Source Error: 
[No relevant source lines]
Source File: c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\26afe35f\1bf18c55\App_global.asax.0.cs    Line: 0 
Stack Trace: 
[ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.]
   System.Reflection.RuntimeModule.GetTypes(RuntimeModule module) +0
   System.Reflection.Assembly.GetTypes() +112
   EPiServer.Find.ClientConventions.<>c__DisplayClass17_0.<MarkAllImplementationsAsNested>b__1(Assembly a) +30
   EPiServer.Find.Helpers.ListExtensions.ForEach(IEnumerable`1 value, Action`1 action) +153
   EPiServer.Find.ClientConventions.NestedConventions.MarkAllImplementationsAsNested(Type declaringType, String name) +352
   EPiServer.Find.Commerce.CatalogContentClientConventions.ApplyNestedConventions(NestedConventions nestedConventions) +298
   EPiServer.Find.Commerce.CatalogContentClientConventions.ApplyConventions(IClientConventions clientConventions) +181
   EPiServer.Find.Commerce.FindCommerceInitializationModule.Initialize(InitializationEngine context) +178
   EPiServer.Framework.Initialization.Internal.ModuleNode.Execute(Action a, String key) +55
   EPiServer.Framework.Initialization.Internal.ModuleNode.Initialize(InitializationEngine context) +123
   EPiServer.Framework.Initialization.InitializationEngine.InitializeModules() +248
[InitializationException: Initialize action failed for Initialize on class EPiServer.Find.Commerce.FindCommerceInitializationModule, EPiServer.Find.Commerce, Version=10.1.2.0, Culture=neutral, PublicKeyToken=8fe83dea738b45b7]
   EPiServer.Framework.Initialization.InitializationEngine.InitializeModules() +834
   EPiServer.Framework.Initialization.InitializationEngine.ExecuteTransition(Boolean continueTransitions) +198
   EPiServer.Framework.Initialization.InitializationModule.EngineExecute(HostType hostType, Action`1 engineAction) +876
   EPiServer.Framework.Initialization.InitializationModule.FrameworkInitialization(HostType hostType) +225
   EPiServer.Global..ctor() +103
   ASP.global_asax..ctor() in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\26afe35f\1bf18c55\App_global.asax.0.cs:0
[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) +142
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +105
   System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark) +1515
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +186
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture) +27
   System.Web.HttpRuntime.CreateNonPublicInstance(Type type, Object[] args) +79
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +281
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +329
[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +525
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +118
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +708
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.2558.0

We are using EPiServer.Find.Commerce 10.1.2 and are on EPiServer CMS 11.5.0, EPiServer Commerce 11.8.3, and EPiServer Find 12.7.1.

I've cleared the bin and obj folder, deleted all Temporary ASP.Net files, reset IIS (I'm using local IIS instead of IIS Express), and cleaned the solution and still running into the same issue.

Any thoughts would be greatly appreciated.

Thank you,

Kevin Larsen