Error converting from h5 to Core ML

[m1chaelt1]

Error: ValueError: Invalid layer: Functional

(coreml) (base) MacBook-Pro-78:Convert michaelt$ python coreml.py
WARNING:root:TensorFlow version 1.15.0 detected. Last version known to be fully compatible is 1.5.0 .
Traceback (most recent call last):
File "coreml.py", line 11, in
image_scale=1/255.)
File "/Users/michaelt/Downloads/YOLO-CoreML-MPSNNGraph-master/Convert/coreml/lib/python2.7/site-packages/coremltools/converters/keras/_keras_converter.py", line 752, in convert
custom_conversion_functions=custom_conversion_functions)
File "/Users/michaelt/Downloads/YOLO-CoreML-MPSNNGraph-master/Convert/coreml/lib/python2.7/site-packages/coremltools/converters/keras/_keras_converter.py", line 532, in convertToSpec
custom_objects=custom_objects)
File "/Users/michaelt/Downloads/YOLO-CoreML-MPSNNGraph-master/Convert/coreml/lib/python2.7/site-packages/coremltools/converters/keras/_keras_converter.py", line 168, in _convert
model = _keras.models.load_model(model, custom_objects = custom_objects)
File "/Users/michaelt/Downloads/YOLO-CoreML-MPSNNGraph-master/Convert/coreml/lib/python2.7/site-packages/keras/models.py", line 142, in load_model
model = model_from_config(model_config, custom_objects=custom_objects)
File "/Users/michaelt/Downloads/YOLO-CoreML-MPSNNGraph-master/Convert/coreml/lib/python2.7/site-packages/keras/models.py", line 193, in model_from_config
return layer_from_config(config, custom_objects=custom_objects)
File "/Users/michaelt/Downloads/YOLO-CoreML-MPSNNGraph-master/Convert/coreml/lib/python2.7/site-packages/keras/utils/layer_utils.py", line 35, in layer_from_config
instantiate=False)
File "/Users/michaelt/Downloads/YOLO-CoreML-MPSNNGraph-master/Convert/coreml/lib/python2.7/site-packages/keras/utils/generic_utils.py", line 125, in get_from_module
str(identifier))
ValueError: Invalid layer: Functional

[m1chaelt1]

keras == 1.2.2
coremltools == 2.0
tensorflow == 1.15.0