The issue below has been confirmed.
We are currently investigating the issue and working to address it.

【Confirmed Issue】
■Players may become stuck when repeatedly speaking with NPC Ryne at the Flounders’ Floor during the main scenario quest “???” progression.

We apologize for any inconvenience this may be causing and thank you for your understanding.

*Updated: Feb. 19, 2020 6:05 a.m. (PST)
A temporary measure has been implemented on Feb. 19, 2020 1:05 a.m. (PST) to address this issue.
Please see details from below link:
https://sqex.to/IDODA

*Updated: Aug. 14 12:00 a.m. (PDT)
This issue was resolved in the Patch 5.3 maintenance preformed on Aug. 10, 2020 3:00 a.m. to Aug. 11, 2020 3:00 a.m. (PDT).
We apologize for any inconvenience this may have caused.