Create UWorld in runtime and use Seamless travel on them

client travel is for network stuff.
also client travel will disconnect you from the server.
“travel” implies space. but that’s not what it does.
so if you need to change the player position. “clienttravel” is the wrong function. use setactortransform instead or setactorlocation or tehir relative counterparts.

travel is to change maps on a networked environment.

you got confused with the uworld. forget about it.
just create a level, like any other regular level.
then use you use the level regularly, by calling “openlevel” i think i forgot, is easy to find. or by using it as a sublevel or level stream

seamless travel is for network again, i don’t know if you want to use seamless travel.
there’s a ton of info about seamless travel, you can find it here unreal seamless travel at DuckDuckGo