Please help!

Umbraco version 7.12.2 Umbraco Forms version 7.4.1

Installing package errored out, now getting this error:

Could not load all types from "MemberListView, Version=1.5.3.0, Culture=neutral, PublicKeyToken=null" due to LoaderExceptions, skipping: . System.IO.FileLoadException: Could not load file or assembly 'System.Web.Http, Version=5.2.7.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) 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: Could not load all types from "MemberListView, Version=1.5.3.0, Culture=neutral, PublicKeyToken=null" due to LoaderExceptions, skipping: . System.IO.FileLoadException: Could not load file or assembly 'System.Web.Http, Version=5.2.7.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[ReflectionTypeLoadException: Could not load all types from "MemberListView, Version=1.5.3.0, Culture=neutral, PublicKeyToken=null" due to LoaderExceptions, skipping: . System.IO.FileLoadException: Could not load file or assembly 'System.Web.Http, Version=5.2.7.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) ] Umbraco.Core.TypeFinder.GetTypesWithFormattedException(Assembly a) +498 Umbraco.Core.TypeFinder.GetClassesWithBaseType(Type baseType, IEnumerable1 assemblies, Boolean onlyConcreteClasses, Func2 additionalFilter) +284 Umbraco.Core.TypeFinder.FindClassesOfType(IEnumerable1 assemblies, Boolean onlyConcreteClasses) +62 Umbraco.Core.<>c__DisplayClass51_01.

[HttpException (0x80004005): Could not load all types from "MemberListView, Version=1.5.3.0, Culture=neutral, PublicKeyToken=null" due to LoaderExceptions, skipping: . System.IO.FileLoadException: Could not load file or assembly 'System.Web.Http, Version=5.2.7.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) ] System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +478 System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +118 System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +176 System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +220 System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +303

[HttpException (0x80004005): Could not load all types from "MemberListView, Version=1.5.3.0, Culture=neutral, PublicKeyToken=null" due to LoaderExceptions, skipping: . System.IO.FileLoadException: Could not load file or assembly 'System.Web.Http, Version=5.2.7.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) ] System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +659 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +90 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +189