Boolean for "Is a level fully loaded on a server"?

I am running a game on a dedicated server, and am getting some errors related to the GetWorld() function; I believe that it’s because the server map is not fully loaded when this function is called. Is there any boolean that is set when the server map is fully loaded?

Looks like the issue is related to this post. I was getting stuck in the transition map when doing seamless travel, and didn’t understand why (using version 5.0.3).