Following the Sep. 10, 2018 version update, we have confirmed and are investigating the issue below.
We ask for your patience as we resolve this issue promptly.

[Current Known Issue]

The following issue occurs when upgrading Relic/Mythic/Empyrean/Ergon/Aeonic Weapons.

- Of the five Ultimate Weapon types, if only an Ergon Weapon is possessed:
When speaking to NPC "Oboro", the selection option "Upgrading my weapon even further" will not appear even if augmentation requirements are met.

- Of the five Ultimate Weapon types, if only an Ergon Weapon and Aeonic Weapon are possessed, and the other three types are not possessed:
When speaking to NPC "Oboro", the selection option "Ancient weapon" for upgrading an Ergon Weapon will not appear after "Upgrading my weapon even further," even if augmentation requirements are met.

We apologize for any inconvenience this may cause.

*The above Known Issue was addressed by the Version Update on Sep. 12, 2018 2:15 (PDT)/9:15 (GMT)/10:15 (BST).