The Kumos Wizard Quest page still links to https://kumos.subeta.net/explore/wizard_exchange.php (which doesn't work). Nor does the Kumos menu vault link, which opens a blank Legacy Frame.
Users have to leave Kumos to open the wizard exchange via the real subeta page.
edit: the same seems to apply to the quest shop links, but they're even weirder eg: https://kumos.subeta.net/npcs/nori/shop#/shop/Wizard
edit: 2 months later...
Page: https://kumos.subeta.net/quests/wizard
Link: https://kumos.subeta.net/explore/wizard_exchange.php (located within text as "wizard exchange") Result: Page with error "No input file specified. "
Link: https://kumos.subeta.net/ss.php/quests#/shop/Wizard (located within text as "quest shop") Result: Page with error "404 Not Found"
I'm assuming this is because neither are housed on Kumos yet.