Im stuck on Quest Defeat the DAX break block 1 time

[MAKI]

why i cant use heavy strike attack i try to change button but not work how to fix this

[RedEssence]

is it the dax on the horse?

If its the guy on the horse you have to parry one of his attacks

[MAKI]

Quest Break enemy block with Heavy Strike 1 time . but i cant use Heavy strike. try to change button many time but nothing happen i can only use normal attacks

[DayLily]

This is happening to me as well. I changed the key binds, but it still doesnt work. I don't want to restart and have to do the quest over again. Its the Dax on the hand in the sky.

[Synopse]

Its a tutorial quest. If I remeber correctly, you have to time the attack correctly. Otherwise nothing will happen.

[badgerish]

can you do a heavy attack while using a Warframe (as opposed to the Drifter?) have you tried pressing and holding the normal melee attack button?