'Kernel' object has no attribute 'masker'

This error message suggests that you are trying to access the 'masker' attribute of a 'Kernel' object, but that attribute does not exist for that object.

There could be a few reasons for this. One possibility is that you are using an outdated or incorrect version of the library or package that includes the 'Kernel' object. Another possibility is that you may have misspelled the attribute name or made a typo in your code.

To resolve this error, you can try checking the documentation or source code for the library or package you are using to confirm that the 'masker' attribute exists and is spelled correctly. You can also try updating to the latest version of the library or package to see if that resolves the issue. Additionally, double-check your code to ensure that you are correctly referencing the 'Kernel' object and its attributes.