"model_path must not be empty" for valid file

[guyluz11]

I have used the example project and added model.onnx from https://huggingface.co/pszemraj/bigbird-pegasus-large-K-booksum under assets/models.

Then I have replaced this line
const assetFileName = 'assets/models/silero_vad.onnx';

with
const assetFileName = 'assets/models/model.onnx';

And getting an error about loading the model:

2025-01-09 09:56:25.374262135 [E:onnxruntime:, inference_session.cc:1644 operator()] Exception during initialization: /onnxruntime_src/onnxruntime/core/optimizer/initializer.cc:30 onnxruntime::Initializer::Initializer(const onnx::TensorProto&, const onnxruntime::Path&) !model_path.IsEmpty() was false. model_path must not be empty. Ensure that a path is provided when the model is created or loaded.

[ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: code=6, message=Exception during initialization: /onnxruntime_src/onnxruntime/core/optimizer/initializer.cc:30 onnxruntime::Initializer::Initializer(const onnx::TensorProto&, const onnxruntime::Path&) !model_path.IsEmpty() was false. model_path must not be empty. Ensure that a path is provided when the model is created or loaded.

#0      OrtStatus.checkOrtStatus (package:onnxruntime/src/ort_status.dart:29:5)
#1      new OrtSession.fromBuffer (package:onnxruntime/src/ort_session.dart:62:15)
#2      VadIterator.initModel (package:onnxruntime_example/vad_iterator.dart:72:27)
<asynchronous suspension>

Running on Linux, the original model works.