BP_FindPlayersConn returns a connection, not an ID.
Soy if ID is not of type BP_connection (i don't know only seeing the code above) you must:
Conn.BP_Connection = BP_FindPlayersConn(blablabla...
Soy if ID is not of type BP_connection (i don't know only seeing the code above) you must:
Conn.BP_Connection = BP_FindPlayersConn(blablabla...