Ecuadorian journalists say Narvaez's absence is due to the problems last year.
Carapaz publicly critized the national team selection for Olympic Games, and since then, the relationship between the federation and the riders has been complicated. It seems to have been a Carapaz-or-Narvaez ultimatum. Carapaz is in, Narvaez isn't; it's clear what they´ve decided this year.
Although the official excuse has been to say that it was not a circuit for Narvaez, something that no one believes. They haven´t made an effort to invent a creible excuse.