When Gladiator beast secutor is summoned off from test tiger from the deck and battles successfully, it gives an error message and does not trigger the effect to summon 2 gladiator beasts from the deck.
Replication steps: summon any gladiator beast> summon test tiger> activate test tiger> summon secutor from deck> secutor attacks successfully> proceed to end of battle phase. Error appears at this moment.
