Interpret optimizeter issue

[tayyabawan786]

i face error ValueError: Could not interpret optimizer identifier: <keras.src.optimizers.legacy.adam.Adam object at 0x78ac23a95ab0>

i have updated transformers also before 1 month it dont have any error now it show me this error when i run this code could you please guide me on this
MODEL_NAME = 'google-bert/bert-base-uncased'

t = text.Transformer(MODEL_NAME, maxlen=400, classes=np.array([0,1]))
trn = t.preprocess_train(np.array(X_train),np.array(y_train))
val = t.preprocess_test(np.array(X_val), np.array(y_val))
model = t.get_classifier()
learner = ktrain.get_learner(model, train_data=trn, val_data=val, batch_size=12)

[amaiya]

What versions of ktrain and TensorFlow are you using?

[tayyabawan786]

i have solved it by using this code
!pip install tf-keras
import os
os.environ['TF_USE_LEGACY_KERAS'] = "True"

[tahlilsiam]

Can you tell me what's the reason of this optimizer interpretation issue?