'View TensorBoard' goes to 502 Bad Gateway

​Hello,

I am trying to launch Tensor board on Tensorflow/Keras on Azure Databricks, but it will go to '502 Bad Gateway' after clicking 'View TensorBoard'.

Please advise how to fix this.

Thanks.

Lo​oking for active tensorboard process...  
Active tensorboard processkilled... 
Starting tensorboard process...  
Tensorboard process started.
TensorBoard log directory set to: /dbfs/ml/lenet/train/1570698969.0092866. View TensorBoard