Hello Selexa. Thanks for your question. I checked the tutorial area for both Spell and Technique and both work on two different PC's which have different kboards and one lap top.
It looks like you didn't manage to type it in time. All spells and techniques that are typed correctly during the period have 100% chance of hitting 0% miss, so you probably didn't managed to type it in time or miss-clicked, hence the fail sound.
X > D W means you need to press X, right arrow, D, W in that order.
You can just skip the tutorial area, it isn't important to finish it, it gives you few fast mechanics to check out before you start the game. To leave it, go to the dock where you spawned in.
If you still have the problem in game (after tutorial area), do send me a message, since this is first time I saw anyone complaining about spells. Or if you have any other issue.
(this is how it should look like but with training dummy and other things behind)
