Yo guys. After messing around with Umbraco Email templaters and uCommerce I came across such error:

Could not load file or assembly 'ServiceStack.Interfaces, Version = 3.9.55.0, Culture = neutral, PublicKeyToken = null' or one of its dependencies. You can not find the file specified.

Description: During the execution of the current web request unhandled exception occurred. For additional information about the error and where it originated in the code review the stack trace.

Exception Details: System.IO.FileNotFoundException: Could not load file or assembly 'ServiceStack.Interfaces, Version = 3.9.55.0, Culture = neutral, PublicKeyToken = null' or one of its dependencies. You can not find the file specified.

Error source:

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

Charging track set: The following information may help you determine why you could not load assembly 'ServiceStack.Interfaces, Version = 3.9.55.0, Culture = neutral, PublicKeyToken = null'.


=== Status information before the link ===
LOG: DisplayName = ServiceStack.Interfaces, Version = 3.9.55.0, Culture = neutral, PublicKeyToken = null
 (Fully-Specified)
Official: Appbase = file: /// C: / Users / user / Documents / UmbracoLocal / UmbracoLocal / UmbracoLocal /
LOG: Initial PrivatePath = C: \ Users \ user \ Documents \ UmbracoLocal \ UmbracoLocal \ UmbracoLocal \ bin
Set impressive: ServiceStack, Version = 3.9.55.0, Culture = neutral, PublicKeyToken = null.
===
JOURNAL: this relationship begins in the context of charging default.
Official: Use an application configuration file: C: \ Users \ user \ Documents \ UmbracoLocal \ UmbracoLocal \ UmbracoLocal \ web.config
Official: Use the host configuration file: C: \ Users \ user \ Documents \ IISExpress \ config \ aspnet.config
Official: Use your computer's configuration file to the C: \ Windows \ Microsoft.NET \ Framework \ v4.0.30319 \ config \ machine.config.
Official: rules are not applied to appeal at this time (private, custom, partial, or location-based link included).
LOG: Attempting download of new URL file: /// C: /Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files / root / 084a2d2c / 5d82edfe / ServiceStack.Interfaces.DLL.
LOG: Attempting download of new URL file: /// C: /Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files / root / 084a2d2c / 5d82edfe / ServiceStack.Interfaces / ServiceStack.Interfaces.DLL.
LOG: Attempting download of new URL file:///C:/Users/user/Documents/UmbracoLocal/UmbracoLocal/UmbracoLocal/bin/ServiceStack.Interfaces.DLL.
LOG: Attempting download of new URL file:///C:/Users/user/Documents/UmbracoLocal/UmbracoLocal/UmbracoLocal/bin/ServiceStack.Interfaces/ServiceStack.Interfaces.DLL.
LOG: Attempting download of new URL file: /// C: /Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files / root / 084a2d2c / 5d82edfe / ServiceStack.Interfaces.EXE.
LOG: Attempting download of new URL file: /// C: /Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files / root / 084a2d2c / 5d82edfe / ServiceStack.Interfaces / ServiceStack.Interfaces.EXE.
LOG: Attempting download of new URL file:///C:/Users/user/Documents/UmbracoLocal/UmbracoLocal/UmbracoLocal/bin/ServiceStack.Interfaces.EXE.
LOG: Attempting download of new URL file:///C:/Users/user/Documents/UmbracoLocal/UmbracoLocal/UmbracoLocal/bin/ServiceStack.Interfaces/ServiceStack.Interfaces.EXE.

Stack trace:


[FileNotFoundException: Could not load file or assembly 'ServiceStack.Interfaces, Version = 3.9.55.0, Culture = neutral, PublicKeyToken = null' or one of its dependencies. You can not find the file specified.]
   UCommerce.Web.Api.ServiceStackAppHostInit.Initialize () 0

[InvalidOperationException: Initialize method in the type UCommerce.Web.Api.ServiceStackAppHostInit, called at the initialization phase before starting the application, raised an exception; error message: Could not load file or assembly 'ServiceStack.Interfaces, Version = 3.9.55.0, Culture = neutral, PublicKeyToken = null' or one of its dependencies. You can not find the file specified ..]
   System.Web.Compilation.BuildManager.InvokePreStartInitMethodsCore (ICollection`1 methods, Func`1 setHostingEnvironmentCultures) 547
   System.Web.Compilation.BuildManager.InvokePreStartInitMethods (ICollection`1 methods) 132
   System.Web.Compilation.BuildManager.CallPreStartInitMethods (preStartInitListPath String, Boolean & isRefAssemblyLoaded) 102
   System.Web.Compilation.BuildManager.ExecutePreAppStart () 153
   System.Web.Hosting.HostingEnvironment.Initialize (ApplicationManager AppManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) 521

[HttpException (0x80004005): Initialize method in the type UCommerce.Web.Api.ServiceStackAppHostInit, called at the initialization phase before starting the application, raised an exception; error message: Could not load file or assembly 'ServiceStack.Interfaces, Version = 3.9.55.0, Culture = neutral, PublicKeyToken = null' or one of its dependencies. You can not find the file specified ..]
   System.Web.HttpRuntime.FirstRequestInit (HttpContext context) 9957060
   System.Web.HttpRuntime.EnsureFirstRequestInit (HttpContext context) 101
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate (IIS7WorkerRequest wr, HttpContext context) 254

Version Information: Microsoft .NET Framework Version: 4.0.30319; Version ASP.NET:4.0.30319.34249

I checked my assemblies and it looks okay, but I'm a beginner at umbraco, so I may have overlooked something. Has any one of you came across such error or knows how to solve it?