Guild Wars 2

vista doesn’t work, i press “F” serveral times but the game doesn’t show me the view.
My world(don’t know if it matter): piken square

Clear the area of any foes. See the talk page for Vistas on the wiki (re combat mode).

That’s probably what happened, you were still in combat without realizing it.

Dana windfelt.8160:

Clear the area of any foes. See the talk page for Vistas on the wiki (re combat mode).

Or just log out and log back in.
A much better option for that vista since it’s full of narrow platforms and enemies use knockback.