We are currently investigating the issue and working to address it.
“Resplendent crafter's tools” that have not been obtained can be purchased by the Calamity Salvager and Journeyman salvager NPC.
*As a temporary measure, with the Several Areas Emergency Maintenance on All Worlds (Apr. 20) performed on April 20, 2021 12:00 a.m. (PDT), players will not be able to select Purchase Quest Rewards → Purchase Achievement Rewards III from the corresponding NPC. We are planning to implement a Hotfix in the near future.
We apologize for any inconvenience this may be causing and thank you for your understanding.
*Edited on Apr. 27, 2021 at 2:00 a.m. (PDT)
The issue above was addressed in the maintenance that took place on Apr. 26, 2021 from 10:00 p.m. to Apr. 27, 2021 2:00 a.m. (PDT)
We sincerely apologize for any inconvenience this may have caused.