Adding more info of the problem: I have followed the explanation from Lubos in this post, It says right there that Report transformation is supposed to act as a template, and then it will appear under Reports section and it can be used as a regular report.
And then click
Createto save the report transformation.
Once the report transformation is created, go toReportstab.
You will see your new report available.
I don’t see it available there, if anyone knows whether this feature is still available or it has been changed at a later date, please let me know.