Doesn't the C10 error mean that your character is online, or that your account is on the select character screen? I've had a C10 error on ecsro back in the days, that meant you had to wait until the server got a restart... Not sure if it's the same on Csro, I'm only saying what I think.
*btw this was caused by lag... So if you were trying to log in during a lag spike or so, might be that problem(I'm not sure), I don't know how to fix it either sorry.
*btw this was caused by lag... So if you were trying to log in during a lag spike or so, might be that problem(I'm not sure), I don't know how to fix it either sorry.