When printing the Standing Sheet, the Team Roster section may not be displayed or printed. This can occur if the league is configured as a Drop-In/Substitute Singles League. By definition, this type of league accommodates bowlers "dropping in" to bowl, but not necessarily on a weekly basis. As such, there are no Team Rosters to maintain as they would constantly be changing from week to week.
To resolve this issue if the league is not a Drop-In/Substitute League, go to Setup > League > General Rules. In the League Features section, toggle the switch for Drop-In/Substitute Singles League to No.