TAO yolo_v3 google colab training failure

after running the training command
print(“To run with multigpu, please change --gpus based on the number of available GPUs in your machine.”)
!tao model yolo_v3 train -e $SPECS_DIR/yolo_v3_train_resnet18_tfrecord.txt
-r $EXPERIMENT_DIR/experiment_dir_unpruned
-k $KEY
–gpus 1

getting error

/usr/local/lib/python3.8/dist-packages/keras/engine/saving.py:292: UserWarning: No training configuration found in save file: the model was not compiled. Compile it manually.
warnings.warn('No training configuration found in save file: ’

Epoch 1/20
Telemetry data couldn’t be sent, but the command ran successfully.
[WARNING]: ‘str’ object has no attribute ‘decode’
Execution status: FAIL