Fix NotImplementedError

✅ Solution

The "NotImplementedError" in transformers often arises when a specific function or method crucial for a task (like saving a model) hasn't been defined or overridden in a particular model's class or configuration. To resolve this, either implement the missing method in the relevant class (e.g., the `save_pretrained` method for saving) or ensure all required methods are implemented by using the appropriate base class and configuration files. Consider carefully reviewing the model's configuration, inheritance structure, and required functionality to identify the missing implementation.