Not being able to connect to the API with my credentials

Aspose.CAD.Cloud.Sdk.ApiException
HResult=0x80131500
Message={“error”:“invalid_client”}
Source=Aspose.CAD.Cloud.Sdk
StackTrace:
at Aspose.CAD.Cloud.Sdk.RequestHandlers.ApiExceptionRequestHandler.ThrowApiException(HttpWebResponse webResponse, Stream resultStream)
at System.Collections.Generic.List1.ForEach(Action1 action)
at Aspose.CAD.Cloud.Sdk.ApiInvoker.ReadResponse(WebRequest client, Boolean binaryResponse)
at Aspose.CAD.Cloud.Sdk.ApiInvoker.InvokeInternal(String path, String method, Boolean binaryResponse, String body, Dictionary2 headerParams, Dictionary2 formParams, String contentType)
at Aspose.CAD.Cloud.Sdk.RequestHandlers.OAuthRequestHandler.RequestToken()
at Aspose.CAD.Cloud.Sdk.RequestHandlers.OAuthRequestHandler.ProcessUrl(String url)
at Aspose.CAD.Cloud.Sdk.ApiInvoker.<>c__DisplayClass14_0.b__0(IRequestHandler p)
at System.Collections.Generic.List1.ForEach(Action1 action)
at Aspose.CAD.Cloud.Sdk.ApiInvoker.InvokeInternal(String path, String method, Boolean binaryResponse, String body, Dictionary2 headerParams, Dictionary2 formParams, String contentType)
at Aspose.CAD.Cloud.Sdk.Api.CadApi.UploadFile(UploadFileRequest request)
at DWGtoPDF.Program.Main(String[] args) in C:\Users\jkincaid\source\repos\DWGPDFConvertV2\Program.cs:line 34

@Jkincaid
Please share your input document and code sample to reproduce the issue.