WEBZEN has scheduled a server maintenance for tomorrow. Plans for an additional maintenance were known at the beginning of this week already. Now they also set the date and time:

Friday, 02/21/2020,
08:00 a.m. to 10:00 a.m. (UTC)

Firstly, the guild storage will be accessible again and secondly, the NPCs from the Lunar New Year event will be permanently removed.