TRT 8.2.0.6 - 'NoneType' object has no attribute 'serialize'

Description

I’m using both TRT 8.2.0.6 Python and C++ versions to inference my onnx model.
While I’m getting to activate the serialization operation of the optimized model, only C++ version is successfully completed while the Python raise an exception - ‘NoneType’ object has no attribute ‘serialize’

Environment

TensorRT Version: 8.2.0.6
GPU Type: GeForce GTX 108
Nvidia Driver Version: 460.32.03
CUDA Version: 11.2
CUDNN Version: 8.2.1
Operating System + Version: Linux Ubuntu 18.04
Python Version (if applicable): 3.6.9
TensorFlow Version (if applicable): NA
PyTorch Version (if applicable): NA
Baremetal or Container (if container which image + tag): Baremetal

Relevant Files

My model was attched in other topic - Onnx model

Steps To Reproduce

type or paste code here
```     self.logger = trt.Logger(trt.Logger.INTERNAL_ERROR)

        self.builder = trt.Builder(self.logger)
        self.builder.max_batch_size = maxBatchSize

        self.config = self.builder.create_builder_config()

        self.EXPLICIT_BATCH = 1 << (int)(trt.NetworkDefinitionCreationFlag.EXPLICIT_BATCH)
        self.network = self.builder.create_network(self.EXPLICIT_BATCH)
        self.parser = trt.OnnxParser(self.network, self.logger)
        self.runtime = trt.Runtime(self.logger)
        self.model = model
        self.parser.parse_from_file(self.model )
        self.engine = self.builder.build_engine(self.network, self.config)
        self.serializedEngine = self.engine.serialize()

Hi,

Please refer python samples here and make sure your script is correct.
https://docs.nvidia.com/deeplearning/tensorrt/developer-guide/index.html#python_topics

If you still face this issue we recommend you to please share complete issue repro script to try from our end and also verbose error logs for better debugging.

Thank you.