My dataset all columns datatype is float64

my dataset all columns datatype is float64 but cannot solve this problem

I have use this link to follow the code Basic regression: Predict fuel efficiency  |  TensorFlow Core

Duplicate Issue Hi Fellows, I copy the code with tensorflow but it can give error

Yes Dear, Unfortunately my post was pending almost 2 days and I solve this issue but failed.

And I try to reply my post but there is no option until other fellow reply your post.

I forget that I changes all the data type float64 in dataframe but run the command in train_features so my friend check the code and tell me that you cannot change the data type in train_features, so I change the datatype in train_features and it was solved.