AttributeError: 'Model' object has no attribute 'metrics_tensors'

This error occurs when you try to access an attribute called "metrics_tensors" on an object of the class "Model", but the attribute does not exist.

There are a few potential reasons why this may happen:

1. The "metrics_tensors" attribute may not be defined for the particular instance of the "Model" class that you are working with. Make sure that you have correctly initialized the model and that it has all the necessary attributes.

2. The "metrics_tensors" attribute may have been removed or renamed in a newer version of the library or framework you are using. Check the documentation for the version you are using to see if this is the case.

3. There may be a typo or other error in your code that is preventing the "metrics_tensors" attribute from being created or accessed correctly. Double-check your code for any mistakes or typos.