Getting the following error when converting pdf to word ServiceApiException 'Access Forbidden

I am facing the exact same issue. It's working in other application but that same code and adobe credentials does not work with the other application. I created free adobe account and used that one for converting docx to pdf but that account also not working.

To find out the exact error, I implemented the Adobe.PDFServiceSDK classes to my app. So, here is the code:

public static HttpBaseResponse<T> CPFStatusApi<T>(InternalExecutionContext context, string location, string targetFormatExtension)
        {
            HttpBaseRequest baseRequestFromRequestContext = context.GetBaseRequestFromRequestContext(RequestKey.STATUS);
            baseRequestFromRequestContext.SetUriTemplate(location);
            baseRequestFromRequestContext.SetTargetFormatExtension(targetFormatExtension);
            HttpClient instance = HttpClient.GetInstance(); 
            try
            {
                HttpBaseResponse<T> httpBaseResponse = instance.Execute<T>(baseRequestFromRequestContext);

                int millisecond = DateTime.Now.Millisecond;
                while (httpBaseResponse.ResponseCode == HttpStatusCode.Accepted)
                {
                    if ((long)(DateTime.Now.Millisecond - millisecond) > 600000L)
                    {
                        throw new ServiceApiException("Operation execution has timed out!", StringUtil.GetRequestIdFromLocation(location), 0);
                    }

                    try
                    {
                        Thread.Sleep(1000);
                    }
                    catch (ThreadInterruptedException inner)
                    {
                        throw new SDKException("Thread interrupted while waiting for operation execution status!!", inner);
                    }

                    httpBaseResponse = instance.Execute<T>(baseRequestFromRequestContext);
                }

                return httpBaseResponse;
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message, ex);
            }
            return null;
        }

 statusResponseContent of the instance object is:

{"cpf:inputs":{"documentIn":{"dc:format":"application/pdf","cpf:location":"file1"},"params":{"cpf:inline":{"targetFormat":"docx"}}},"cpf:engine":{"repo:assetId":"urn:aaid:cpf:Service-26c7fda2890b44ad9a82714682e35888"},"cpf:status":{"completed":true,"type":"","title":"Access Forbidden; transactionId=gVET6L2RYFLjE0uKnntIUUaG3xOFJ29J","status":403,"report":"{\"error_code\":\"FORBIDDEN\"}"}}

 and then instance.Execute also retuns the "Access Forbidden" with 403 status code.

This is frustrating and nightmare for me. Any help is highly appreciated.

Thank you.