When I install tensorflow 2.5.0 then model.fit() occurs errors

[HoyaCho]

Describe the current behavior !pip install tensorflow==2.5.0

after install tensorflow 2.5.0, almost all codes occur errors. But it's okay in tensorflow 2.6.0. Just testing Coursera DeepLearning.AI TensorFlow Developer Course's Source.

Describe the expected behavior Running Coursera Testing Source on tensorflow==2.5.0

What web browser you are using (Chrome)

Additional context Link to a minimal, public, self-contained notebook that reproduces this issue.

• Share the file using your GitHub account using File > Save a copy as a GitHub Gist.
• or Share Drive notebooks using the Share button then 'Get Shareable Link C3_W4_Lab_2_irish_lyrics_ipynb.zip '.

[colaboratory-team]

Dup of #2336.

[HoyaCho]

If I use tensorflow 2.6.0, there is no error. I know about that. But I prepare to earn TDC, TDC recommend to use tensorflow 2.5.0. So, I need to install 2.5.0. Is there no problem if I use 2.6.0 to prepare TDC?