ValueError: bad marshal data (unknown type code)

[KevinRK27]

i followed the step 1 provided on the github but i get this error
home/kevinrk/.local/lib/python3.8/site-packages/tensorflow/python/keras/backend.py:437: UserWarning: tf.keras.backend.set_learning_phase is deprecated and will be removed after 2020-10-11. To update it, simply pass a True/False value to the training argument of the __call__ method of your layer or model.
warnings.warn('tf.keras.backend.set_learning_phase is deprecated and '
Traceback (most recent call last):
File "h5topb.py", line 13, in
model = load_model(MODEL_PATH)
File "/home/kevinrk/.local/lib/python3.8/site-packages/keras/utils/traceback_utils.py", line 67, in error_handler
raise e.with_traceback(filtered_tb) from None
File "/home/kevinrk/.local/lib/python3.8/site-packages/keras/utils/generic_utils.py", line 793, in func_load
code = marshal.loads(raw_code)
ValueError: bad marshal data (unknown type code)