Short post but a very overlooked piece of the EVAP system is the Fuel Vapor Feed Pipe, these are usually pretty brittle and can break easily so make sure to check it out before you dive into the charcoal canister or buying a new purge valve. Extremely cheap part as well.

This post on the is forum shows location and gives you an idea of what could be wrong -> https://www.my.is/threads/broken-fue...cluded.611881/

Part number is: 23818-46110