Is the machine learning part of "Apache Spark™ Tutorial: Getting Started with Apache Spark on Databricks" missing or no longer available?

[self-employed]

I am following the Apache Spark™ Tutorial. When I finish the data set part and want to continue the machine learning part. I found the page is empty. The next section after machine learning is fine. So I guess there must be a url mismatching.

The url for machine learning which is missing is below:

https://databricks.com/spark/getting-started-with-apache-spark/machine-learning-1#overview

[self-employed · Accepted solution]

I clean the cookie and then the link recovers. So it is an issue about cookie.