title: Specflow skips test after execution with error: Error while unpacking executor:
body: <p>after updating SpecflowRunner to 3.5.8 and re-installing the Specflow Package 2017.2.1 my tests cannot be executed and are skipped instead. When I open the log file I find this Error message:</p>
  <p><strong>Error while unpacking executor: System.TypeLoadException: The method &quot;Initialize&quot; in type &quot;TechTalk.SpecRun.Framework.TestAssemblyExecutor&quot; of the assembly &quot;TechTalk.SpecRun.Framework.Executor, Version=1.8.0.0, Culture=neutral, PublicKeyToken=null&quot; is not implemented.</strong></p>
  <p>(Sorry, I had to translate the message)</p>
  <p>A friend of mine has the same versions, but everything runs smoothly. We both use Visual Studio 2017.
  Did I miss something, a cache that has to be cleared or anything else?</p>