Welcome to the Lost Ark forum
I apologize you were having this issue.
Please confirm if this error still occurs or not.
Please try these steps to confirm it’s not a visual bug if you still have the issue :
Close Lost Ark completely
Run Steam as administrator
Check the game files on Steam
Open Lost Ark.
After this, if the problem persists, we will need some personal information from your account. You can contact our customer service live chat so that we can help you report this problem with a ticket so that our developers can work on solving it.
Thank you very much for your patience.
Have a great week.