This Thursday, May 26, 2022, Amazon Games will be conducting weekly maintenance to fix various bugs and issues found in Lost Ark, including one related to the Valor Coins that can be obtained in PvP. The maintenance starts at 9:00 am (Madrid time) and finish five hours later, around 2:00 pm. The time CEST indicated in the official announcement stands for Central European Summer Time. It is specifically Madrid time, Spanish time, converted to summertime (to put it most simply).

Lost Ark Patch Notes for May 26, 2022
All Lost Ark servers and regions will be offline today, May 26, from 9 am CEST for regular weekly updates and maintenance. Server downtime is expected to last up to 5 hours and will allow the following fixes to be applied:

Fixed an issue where players would receive the wrong amount of High-Value Coins at the end of a PvP match
The Lost Ark team also identifies users who received the wrong amount of Valor Coins after the monthly update and makes up the difference between what was earned and what should have been. It is a more manual process that will take several more days than established, so the study asks for patience from players who have suffered this failure.

They fixed an issue that allowed players to send HTML in the chat window, resulting in excessive whitespace.
Fixed an issue that would crash Book of Coordination saving if combat skill presets were loaded on a warlock
It is expected that everything will be solved by the afternoon, and players can return to Archesia as usual.