Unity does not build my game

I am using Unity 2018.4.15f1 Personal
When i click build it starts building and loading screen appears and when loading is over it gets me to the file i selected to build the game but when i click to the folder there is nothing

Is this picture ok?
Also i am getting these errors

Hi @akinhk,

Could you verify that WebGL Build is working in general by starting a new project and building it in WebGL? If the WebGL build installation failed, you might not be able to build anything.

If you have verified that the build works in general, then could you copy and past the text in the first screenshot where you get the errors?

-Jason