run button does not work

Hello, 

Click "Add configuration" to define what java binary should be used to run the program. 

Here you could fin more details: 

https://www.jetbrains.com/help/idea/2019.2/running-applications.html?_ga=2.27253311.305469740.1564972768-1531330835.1556592966 

Sorry, I don’t understand what I need to do here. Your link is not responding

Please check your internet connection. The link is working even using LTE:) 

You just need to click "+" at the top right and define the class which should be run (HelloWorld in your case). See the gif as a reference

Unfortunately I do not find it

Please move HelloWorld.java file into the src folder (which is marked as sources directory), so IntelliJ IDEA will automatically detect HelloWorld class as a class that could be added as the main class. 

Does not find but a strange inscription appeared

Thank you, it works