Unable to run the test even after changing the code

i tried to practice the golang but after writing 3 codes , it stopped working and even if i change the code its saying that i have no made any changes in the code!

anche io ho lo stesso problema, cerco di testare il codice ma si รจ bloccato

The API went down. It should come back up in a minute. Sorry for the inconvienience.

its still down!!!