Item unavailable after quest

I’ve just completed the 20th floor of the tower in order to obtain the skill potion after completing the floor. Despite this, once I exited the tower the potion wasn’t available in my storage. I’ve tried to run the same floor again but it didn’t wok out.

It should get added automatically, check your skill page that your total skillpoint have increased by 3(? don’t remember the exact amount),

No, the item didn’tt appear when I finish the floor, and I’m Still with 264 skill pionts at lvl 50. So it didn’t add automatically.