Hi! I took a quick search and I couldn't find anything regarding this (or my searching skills are lacking). Last time I played was around 8+ months ago, so things may have changed.
Issue 1: Cannot multi-client
I used to be able to multi-client before I got a new GPU. Whenever the UAC prompt pops up, the previous client freezes and needs to be forced closed. Disabling UAC will probably count as a workaround, but I would rather not disable it for one thing only.
Issue 2: Cannot properly move the window
When the Ragnarok Online window is focused on, it seems like I can only move it within the confines of the window itself. I know this is hard to explain without it being shown, but it basically means I can't move it up (since the way I move windows is by clicking on the top, this means it's at its limit) and I can't move it side to side all the way at once.
Other info:
OS: Windows 11
Processor: R5 3600
GPU: RTX 4070 (used a RX 5700XT before)
Monitors: 1920x1080 * 2