Hi! I got an error that was like this after I launched the game. However, I had already been playing the game for about an hour before the error occurred.
The error message appeared after I disconnected after a “lobby server” message which instantly quit the game while I was in a dungeon. I wasn’t able to log back on for a while, and when I tried it kept giving me the unable to complete version check error sign.
I will try again tomorrow to see if the problem persists.