Ohh thx for this, I was really very sad thinking about not being able to recover :(
thx so much Ashley, I really didn't know about this three points polygon collision, but I'm sure didn't move anything in the object "espinhoqsai", so much that I had saved the project and compiled it for html5 several times after having programmed and created the "espinhoqsai" object.
I don't know how to add points in mask collision sprite editor.