significant otter achievement

I have 10 Memory of Otter. It says "double click to consume. Grants progress toward significant otter achievement.I do not have significant otter achievement yet. Double clicking Memory of Otter, displays the message "Unavailable. Try again later".Am I missing a prerequisite for this?

The wiki has the steps for greeting to the final goal. If I remember right your first goal is to complete the Treasure Sleuth achievement

You need the Significant Otter achievement unlocked to be able to use the Memory of Otter.

The wiki mentions that:

Only obtainable after unlocking the Significant Otter achievement.

• https://wiki.guildwars2.com/wiki/Memory_of_Otter

Which held true at least when I did the achievement and meta. My assumption here is: you probably salvaged a Charged/Volcanic Stormcaller Weapon and the 10 Memories are guaranteed salvage reward. Thus giving you 10 MoO without yet having unlocked the corresponding achievement.

I missed the footnote about the vault door. I have the achievement now

@Sao Deadeye.4569 said:I missed the footnote about the vault door. I have the achievement now

Well Same for me :)