Exception has been thrown by the target of an invocation.

Hi,

When our freelancer open a package and then the Project in sdl trados studio he get this error : "Exception has been thrown by the target of an invocation." The project has been created with 2017 version, and our freelancer has 2015 SR3, see the attached error below, any have an idea to resolve this?

<SDLErrorDetails time="10/17/2017 4:09:38 PM">
  <ErrorMessage>Exception has been thrown by the target of an invocation.</ErrorMessage>
  <Exception>
    <Type>System.Reflection.TargetInvocationException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
    <HelpLink />
    <Source>mscorlib</Source>
    <HResult>-2146232828</HResult>
    <StackTrace><![CDATA[   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark)
   at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
   at System.Activator.CreateInstance(Type type, Object[] args)
   at Sdl.TranslationStudio.Editor.TranslationEditor.Intellisense.SuggestionDataProvidersFactory.GetSuggestionDataProviderObject(Type suggestionDataProviderType, IEditorService editorService, ITranslatableDocumentEditorSettings editorSettings, TranslationMemorySettings translationMemorySettings)
   at Sdl.TranslationStudio.Editor.TranslationEditor.Intellisense.SuggestionDataProvidersFactory.GetSuggestionDataProviderObjects(IList`1 suggestionDataProviderTypes, IEditorService editorService, ITranslatableDocumentEditorSettings editorSettings, TranslationMemorySettings translationMemorySettings)
   at Sdl.TranslationStudio.Editor.TranslationEditor.Intellisense.SuggestionDataProvidersFactory.CreateSuggestionDataProviders(IEditorService editorService, ITranslatableDocumentEditorSettings editorSettings, TranslationMemorySettings translationMemorySettings)
   at Sdl.TranslationStudio.Editor.TranslationEditor.Intellisense.IntellisenseEditing.Hook(ITranslatableDocument doc, ITranslatableDocumentEditingView documentEditingView)
   at Sdl.TranslationStudio.Editor.TranslationEditor.SideBySideDocumentEditingView.HookIntellisense()
   at Sdl.TranslationStudio.Editor.EditorService.document_Loaded(IDocument document)
   at Sdl.TranslationStudio.Api.Editor.AbstractInternalDocument.OnLoaded()
   at Sdl.TranslationStudio.Editor.TranslationEditor.TranslatableDocument.OnLoaded()
   at Sdl.TranslationStudio.Api.Editor.AbstractInternalDocument.AfterLoad(IJob job)]]></StackTrace>
    <InnerException>
      <Type>System.NullReferenceException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
      <HelpLink />
      <Source>Sdl.TranslationStudio.Editor</Source>
      <HResult>-2147467261</HResult>
      <StackTrace><![CDATA[   at Sdl.TranslationStudio.Editor.TranslationMemory.AnyAutoSuggest.AnyAutoSuggestProvider.SearchFilter(ProjectCascadeEntryData entryData)
   at Sdl.ProjectApi.Helpers.ProjectCascadeFactory.FilterProjectCascadeEntryDataList(IList`1 projectCascadeEntryDataList, ProjectCascadeEntryDataFilterFunction filter)
   at Sdl.ProjectApi.Helpers.ProjectCascadeFactory.CreateCascade(ProjectCascadeSettings projectCascadeSettings, Boolean refreshCache)
   at Sdl.TranslationStudio.Editor.TranslationMemory.AnyAutoSuggest.AnyAutoSuggestProvider.GetTranslationProviderCascade()
   at Sdl.TranslationStudio.Editor.TranslationMemory.AnyAutoSuggest.AnyAutoSuggestProvider.StartTranslatingSegment(ITranslatableDocument document, ISegmentPair segmentPair)
   at Sdl.TranslationStudio.Editor.TranslationMemory.AnyAutoSuggest.AnyAutoSuggestProvider.UpdateTranslations()
   at Sdl.TranslationStudio.Editor.TranslationMemory.AnyAutoSuggest.AnyAutoSuggestProvider..ctor(IEditorService editorService, ITranslatableDocumentEditorSettings editorSettings, TranslationMemorySettings translationMemorySettings)]]></StackTrace>
    </InnerException>
  </Exception>
  <Environment>
    <ProductName>SDL Trados Studio</ProductName>
    <ProductVersion>12.0.0.0</ProductVersion>
    <EntryAssemblyFileVersion>12.3.5281.10</EntryAssemblyFileVersion>
    <OperatingSystem>Microsoft Windows Server 2012 R2 Datacenter</OperatingSystem>
    <ServicePack>NULL</ServicePack>
    <OperatingSystemLanguage>1036</OperatingSystemLanguage>
    <CodePage>1252</CodePage>
    <LoggedOnUser>DOMAIN_TRANS\ssrolemberg</LoggedOnUser>
    <DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
    <ComputerName>TRANSTS03</ComputerName>
    <ConnectedToNetwork>True</ConnectedToNetwork>
    <PhysicalMemory>25165364 MB</PhysicalMemory>
  </Environment>
</SDLErrorDetails>
Thanks!