"Learn 02" what do wrong?

In turtorial i mast change value to 1, but this don't wont work.

Or what i do wrong?

 

It looks like the value is already set to 1. If the next button isn't enabled, just hit backspace and delete and re-enter 1, might help.

 

Unity's Interactive Tutorials (at least that's what it looks like it is) have troubles beyond the release they were made for. If the suggestion by @JeffDUnity3D doesn't work you might need to go back to the release that the tutorials were verified against which is Unity 2018.1.

 

try 10 or 0.1 etc. unity tutorial steps are bugged, most of the value inputting tutorial steps accepts different values than what the tutorial says. unity should learn to test their things only one time before publishing right?