I created a map with triggers and they do not work in voobly, but in the map editor test it works.
Why it does not work?

There are several triggers, which are not working multiplayer since 1.0 and this maybe will be never fixed. Example: Object selected, Object visible/not visible.

Also I moved your topic to Custom Scenario > Scenario Design > Guides from Custom Scenario > General CS Discussions >

thanks for answering
I'm trying to make the player click on a house and a soldier appears

using:
Trigger: With loop
Condition: Select Object (House)
Effect: Create Object (Soldier)

so I can quit since it does not work :/

my real goal was to make a zombie map by the triggers because I do not know how to create map for the mod 'Zombie Apocalypse'

That won't work in multiplayer, sorry. You have to find an other way.