"Object reference not set to an instance of an object"

Hi,

 

I am trying to prepare a project using some html files. When the project is preparing I get an error message for all the files saying "Object reference not set to an instance of an object"

The whole error message is below.

Can anyone provide some assistance on what I can do as at the moment I cannot prepare this project.

Thanks in advance

 

<?xml version="1.0"?>

-<SDLErrorDetails time="9/7/2017 10:47:15 AM">

<ErrorMessage>Object reference not set to an instance of an object.</ErrorMessage>


-<Exception>

<Type>System.NullReferenceException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>

<HelpLink/>

<Source>Sdl.FileTypeSupport.Filters.Html</Source>

<HResult>-2147467261</HResult>


-<StackTrace>

<![CDATA[ at Sdl.FileTypeSupport.Filters.Html.Services.ParagraphUnitOutputService.IsProtectedStyleElement(HtmlParserElement htmlParserElement) at Sdl.FileTypeSupport.Filters.Html.Services.ParagraphUnitOutputService.AddMetaForCssStyleEntity(IParagraphUnit paragraphUnit, HtmlParserElement htmlParserElement) at Sdl.FileTypeSupport.Filters.Html.Services.ParagraphUnitOutputService.Output(HtmlParserElement htmlParserElement) at Sdl.FileTypeSupport.Filters.Html.Consumers.Parser.NonHtmlContentConsumer.Consume(Entity entity) at Sdl.FileTypeSupport.Filters.Html.Routes.Parser.NonHtmlContentEntityRoute.Handle(Entity entity) at lambda_method(Closure , IMessage ) at Sdl.FileTypeSupport.Filters.Html.Infrastructure.Dispatcher.Publish(IMessage message) at Sdl.FileTypeSupport.Filters.Html.Parser.EntityParsed(Entity entity) at Sdl.FileTypeSupport.Filters.Html.Services.ParserService.Publish(Entity parsedEntity) at Sdl.FileTypeSupport.Filters.Html.Services.ParserService.Parse() at Sdl.FileTypeSupport.Filters.Html.Parser.ParseNext() at Sdl.FileTypeSupport.Framework.Integration.FileExtractor.ParseNext() at Sdl.FileTypeSupport.Framework.Integration.MultiFileConverter.ParseNext() at Sdl.FileTypeSupport.Framework.Integration.MultiFileConverter.Parse() at Sdl.ProjectApi.AutomaticTasks.Conversion.ConversionTask.ProcessFile(IExecutingTaskFile executingTaskFile) at Sdl.ProjectApi.AutomaticTasks.AbstractFileLevelAutomaticTaskImplementation.Execute()]]>

</StackTrace>

</Exception>


-<Environment>

<ProductName>SDL Trados Studio</ProductName>

<ProductVersion>12.0.0.0</ProductVersion>

<EntryAssemblyFileVersion>12.3.5281.10</EntryAssemblyFileVersion>

<OperatingSystem>Microsoft Windows 7 Professional </OperatingSystem>

<ServicePack>Service Pack 1</ServicePack>

<OperatingSystemLanguage>1033</OperatingSystemLanguage>

<CodePage>1252</CodePage>

<LoggedOnUser>PEAK\peak5</LoggedOnUser>

<DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>

<ComputerName>PEAK-0315-01</ComputerName>

<ConnectedToNetwork>True</ConnectedToNetwork>

<PhysicalMemory>4100308 MB</PhysicalMemory>

</Environment>

</SDLErrorDetails>