ERROR: Failed to create network using custom network creation function

There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks

That means there are errors in your configuration. You may refer to DeepStream Reference Application - deepstream-app — DeepStream 6.3 Release documentation and DeepStream SDK FAQ - Intelligent Video Analytics / DeepStream SDK - NVIDIA Developer Forums for more details.