tensorflow.python.framework.errors_impl.UnimplementedError: TFRT is not supported。

tensorflow.python.framework.errors_impl.UnimplementedError: TFRT is not supported报错
代码段只有三句

from keras.models import Sequential
from keras.layers.core import Dense,Activation,Flatten

model = Sequential()

tfrt需要单独安装
https://github.com/tensorflow/runtime