predict not True

[duongngocthien]

I use the demo file to predict, the config file is like below.
dataset_builder: &ds_builder
table_path: 'example/table.txt'
img_shape: [32, null, 3]
max_img_width: 400
ignore_case: true

train:
dataset_builder:
<<: *ds_builder
train_ann_paths:
- '/content/gdrive/MyDrive/CRNN/CRNN.tf2/example/annotation_train.txt'
- '/content/gdrive/MyDrive/CRNN/CRNN.tf2/example/annotation_val.txt'
val_ann_paths:
- '/content/gdrive/MyDrive/CRNN/CRNN.tf2/example/annotation_test.txt'
batch_size_per_replica: 32
# Number of epochs to train.
epochs: 2000
lr_schedule:
initial_learning_rate: 0.0001
decay_steps: 600000
alpha: 0.01
# TensorBoard Arguments
# https://www.tensorflow.org/api_docs/python/tf/keras/callbacks/TensorBoard#arguments_1
tensorboard:
histogram_freq: 1
profile_batch: 0

eval:
dataset_builder:
<<: *ds_builder
ann_paths:
- '/content/gdrive/MyDrive/CRNN/CRNN.tf2/example/annotation_eval.txt'
batch_size: 1

probability: [0.9999411] , but result show is . It only displays numbers, not characters.
The result it returns is :
test_images/IMG_20211212_091803.jpg, y_pred: [b''], probability: [0.9999411] .
While I'm looking forward to is :"HSD".
Hope you answer.

[FLming]

Can you attach the first or second image?