Getting stuck on infinite loop

In the training section of the model it gets stuck on training and doesn’t move any further. So training is not taking place.

Hi, can you please share your code with me.

This is the link to my google colab notebook have a look.

https://colab.research.google.com/drive/1kqmA35zAx8_iq7IIX18hNbidZEMBhJR9