I'm trying to upgrade a DNN site from 9.13.9 to latest 10x and when I do the upgrade to 10.2.5 I get this error below.

Anyone seen this before? Any ideas?

Method not found: 'System.ValueTuple`2 DotNetNuke.Abstractions.Security.ICryptographyProvider.EncryptParameter(System.String, System.String)'.

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.MissingMethodException: Method not found: 'System.ValueTuple`2 DotNetNuke.Abstractions.Security.ICryptographyProvider.EncryptParameter(System.String, System.String)'.

[MissingMethodException: Method not found: 'System.ValueTuple`2 DotNetNuke.Abstractions.Security.ICryptographyProvider.EncryptParameter(System.String, System.String)'.]
   DotNetNuke.Web.Common.Internal.DotNetNukeHttpApplication..cctor() +0

[TypeInitializationException: The type initializer for 'DotNetNuke.Web.Common.Internal.DotNetNukeHttpApplication' threw an exception.]
   ASP.global_asax..ctor() +17

[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) +122
   System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) +239
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +85
   System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark) +1173
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +130
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture) +21
   System.Web.HttpRuntime.CreateNonPublicInstance(Type type, Object[] args) +59
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +148
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +303

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +657
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +89
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +189