Test Installation Problem

[Elegadro]

I am using Google Colab and I followed steps in the installaton doc. When I tried test my installation with python object_detection/builders/model_builder_tf2_test.py, I took this error.

2022-03-04 18:02:58.839652: I tensorflow/stream_executor/platform/default/dso_loader.cc:53] Successfully opened dynamic library libcudart.so.11.0
Traceback (most recent call last):
  File "object_detection/builders/model_builder_tf2_test.py", line 26, in <module>
    from object_detection.builders import model_builder
  File "/usr/local/lib/python3.7/dist-packages/object_detection/builders/model_builder.py", line 37, in <module>
    from object_detection.meta_architectures import deepmac_meta_arch
  File "/usr/local/lib/python3.7/dist-packages/object_detection/meta_architectures/deepmac_meta_arch.py", line 19, in <module>
    from object_detection.models.keras_models import resnet_v1
  File "/usr/local/lib/python3.7/dist-packages/object_detection/models/keras_models/resnet_v1.py", line 28, in <module>
    from keras.applications import resnet  # pylint:disable=g-import-not-at-top
  File "/usr/local/lib/python3.7/dist-packages/keras/__init__.py", line 25, in <module>
    from keras import models
  File "/usr/local/lib/python3.7/dist-packages/keras/models.py", line 20, in <module>
    from keras import metrics as metrics_module
  File "/usr/local/lib/python3.7/dist-packages/keras/metrics.py", line 27, in <module>
    from keras import activations
  File "/usr/local/lib/python3.7/dist-packages/keras/activations.py", line 20, in <module>
    from keras.layers import advanced_activations
  File "/usr/local/lib/python3.7/dist-packages/keras/layers/__init__.py", line 93, in <module>
    from keras.layers.core import Masking
  File "/usr/local/lib/python3.7/dist-packages/keras/layers/core/__init__.py", line 20, in <module>
    from keras.layers.core.dropout import Dropout
  File "/usr/local/lib/python3.7/dist-packages/keras/layers/core/dropout.py", line 26, in <module>
    class Dropout(base_layer.BaseRandomLayer):
AttributeError: module 'keras.engine.base_layer' has no attribute 'BaseRandomLayer'