Unable to run specflow tests using vstest.console.exe - visual-studio-2017

Question

I am trying to run speflow tests based on visual studio runner but getting error in vsts. I am using the following vsts test runner task:
C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\IDE\CommonExtensions\Microsoft\TestWindow\vstest.console.exe myassembly.dll
Error:
System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types
Retrieve the LoaderExceptions property for more information.
I have tried:
/TestAdapterPath: "Adapterpath"/UseVsixExtensions:True/False(Both option)/Platform:[ platform type ]
... but none of these are working; tests are working fine in Visual Studio 2017, but are still not working in the CI job.

Answer 1

Below lines of code helped me in identifying the missing dll now it's build which need to be fixed.
try
{
}
catch (System.Reflection.ReflectionTypeLoadException ex)
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
foreach (System.Exception exSub in ex.LoaderExceptions)
{
sb.AppendLine(exSub.Message);
System.IO.FileNotFoundException exFileNotFound = exSub as System.IO.FileNotFoundException;
if (exFileNotFound != null)
{
if (!string.IsNullOrEmpty(exFileNotFound.FusionLog))
{
sb.AppendLine("Fusion Log:");
sb.AppendLine(exFileNotFound.FusionLog);
}
}
sb.AppendLine();
}
string errorMessage = sb.ToString();
throw new System.Exception(errorMessage);
}