[Troubleshooting] Errors that occur during NNTrainer learning after TFlite export

[Donghak PARK]

in case of below, nntrainer get error

model->compile();
model->initialize();
model->exports(ml::train::ExportMethods::METHOD_TFLITE, "Exported.tflite");
model->train();

Make some exception, and make robust for this case

[taos-ci]

cibot: Thank you for posting issue #2256. The person in charge will reply soon.

[Jagrati Verma]

yes i tried this method too for tflite export to didnt work caused error