Getting this error when running custom tool to generate models from the models builder api

UmbracoModelsBuilder: Starting v3.0.6.97 11.01.2019 11:50:46. UmbracoModelsBuilder: UmbracoModelsBuilder failed to generate code: Exception: Response status code does not indicate success (InternalServerError) {"Message":"An error has occurred.","ExceptionMessage":"The type initializer for 'File' threw an exception.","ExceptionType":"System.IO.IOException","StackTrace":" at Roslyn.Utilities.FileUtilities.OpenFileStream(String path)\r\n at Microsoft.CodeAnalysis.MetadataReference.CreateFromFile(String path, MetadataReferenceProperties properties, DocumentationProvider documentation)\r\n at Umbraco.ModelsBuilder.ReferencedAssemblies.<>c.<.cctor>b22(String x) in D:\d\Zbu ModelsBuilder-7\Umbraco.ModelsBuilder\ReferencedAssemblies.cs:line 24\r\n at System.Linq.Enumerable.WhereSelectListIterator2.MoveNext()\r\n at System.Linq.Buffer1..ctor(IEnumerable1 source)\r\n at System.Linq.Enumerable.ToArray[TSource](IEnumerable1 source)\r\n at System.Lazy1.CreateValue()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Lazy1.getValue()\r\n at Umbraco.ModelsBuilder.Api.ApiHelper.GetModels(String modelsNamespace, IDictionary2 files) in D:\\d\\Zbu ModelsBuilder-7\\Umbraco.ModelsBuilder\\Api\\ApiHelper.cs:line 16\r\n at Umbraco.ModelsBuilder.Api.ModelsBuilderApiController.GetModels(GetModelsData data) in D:\\d\\Zbu ModelsBuilder-7\\Umbraco.ModelsBuilder.Api\\ModelsBuilderApiController.cs:line 65\r\n at lambda_method(Closure , Object , Object[] )\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ApiControllerActionInvoker.0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Filters.ActionFilterAttribute.

This was after i installed and uninstalled UAparser package. Any ideas on how to troubleshoot this further?