Always getting : File x doesn't exists. At least file with CSV header must exist.

Hello,

I am unsure whether this is a bug or I am just missing something.
I am learning MidPoint - I was following this tutorial - https://www.youtube.com/watch?v=HBYZpZ22fDo

At about 2:00 I am supposed to use a wget command - that did not work for me.
When I try to use that command, I just get : Connecting to raw.githubusercontent.com... and it never connects.

So I copied the content of the hr.csv file from here : https://raw.githubusercontent.com/Evolveum/midpoint-samples/master/samples/book/5/hr.csv
and used it to create my totally same hr.csv.

But when I want to change file path in edit configuration (for HR System) and test the connection, it always throws this error : Configuration error: File 'pathToFile/file' doesn't exists. At least file with CSV header must exist.

I tried the path on the video, I also tried my Dmidpoint.home path. But I keep getting the same error.

Is there any specific path that I must use to make it work ? Or am I typing the path in an incorrect format ?

Thanks for help ! / Díky !