Hello.
This is the Ragnarok Zero operations team.
We would like to inform you about the runtime error issue.
This symptom can occur on PCs that do not have the latest Windows OS updates applied,
and we recommend installing the Visual Studio 2017 Redistributable Package.
Please install x86: vc_redist.x86.exe from the URL below.
[Visual Studio 2017 Redistributable Package]
We hope this information helps you enjoy the game without any inconvenience.
Thank You.
Gravity Co., Ltd. Ragnarok Zero Operations Team