getting TextVectorization Error On Keeping pad_to_max_tokens=True

[kelixirr]

When I am keeping pad_to_max_tokens=True I am getting error but with pad_to_max_tokens=False error resolves. In video 227, there is no error with True. Why is that?

import tensorflow as tf 

text_vectorizer = tf.keras.layers.TextVectorization(max_tokens=None,
                                                     standardize='lower_and_strip_punctuation',
                                                     split="whitespace",
                                                     ngrams=None,
                                                     output_mode="int",
                                                     output_sequence_length=None,
                                                     pad_to_max_tokens=False)