DSL: Problem after update to VS 2019

Hi to everybody reading this,

wen have a problem after updating VS to 2019 (16.0.1): Our DSL doesnt compile anymore. Exception: A processor named 'DslDirectiveProcessor' could not be found for the directive named 'Dsl'. (Complete Exception attached further down)

Things I tried:

Find an information about upgrading to VS2019 Modelling Tools - Nothing

Find information about the exception - Nothing

Reinstalled Text Templating and Modeling SDK - Nothing.

Now I hope somone here can help me out with a hint to the solution.

Thanks a lot in advance!

Soenke Pries

Complete Exception:

ErrorA processor named 'DslDirectiveProcessor' could not be found for the directive named 'Dsl'. The transformation will not be run.  The following Exception was thrown:
System.IO.FileNotFoundException: Could not load file or assembly 'file:///C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\Extensions\Microsoft\DSL SDK\Dsl Designer\16.0\Microsoft.VisualStudio.Modeling.Sdk.DslDefinition.16.0.dll' or one of its dependencies. Das System kann die angegebene Datei nicht finden.
File name: 'file:///C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\Extensions\Microsoft\DSL SDK\Dsl Designer\16.0\Microsoft.VisualStudio.Modeling.Sdk.DslDefinition.16.0.dll'
   at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalLoadFrom(String assemblyFile, Evidence securityEvidence, Byte[] hashValue, AssemblyHashAlgorithm hashAlgorithm, Boolean forIntrospection, Boolean suppressSecurityChecks, StackCrawlMark& stackMark)
   at System.Reflection.Assembly.LoadFrom(String assemblyFile)
   at Microsoft.VisualStudio.TextTemplating.Sdk.Host.GenericTextTemplatingHost.GetDirectiveProcessorType(DirectiveProcessorRecord record)
   at Microsoft.VisualStudio.TextTemplating.Sdk.Host.GenericTextTemplatingHost.ResolveDirectiveProcessor(String processorName)
   at Microsoft.VisualStudio.TextTemplating.Engine.ProcessCustomDirectives(ITextTemplatingEngineHost host, TemplateProcessingSession session, IEnumerable`1 directivesToBeProcessed)

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].
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