Hello,
I am writing this post because I am doing the Zend Explore Free Training for my job. I am stuck in the exercise for creating a calculated metric. I keep getting an error that the format is incorrect. I made sure to type it out just in case I was pasting invisible characters.
I was reviewing the previous forum post and I did not notice any similar issue.
Thanks for the help in advance.

I'm curious if you're using the Updates History dataset because these metrics are exclusively available in the Updates History dataset. Additionally, you might consider changing "Changes - Field Names" to "Changes - Field Name" since that is the name of the default metric.