Custom potions don't work

I was trying to create a custom potion the other day when I saw that instead of showing Glowing which I put in it said "No Effects". Assuming that it was a visual glitch , I threw it at myself, but nothing happened. (If this is a bug with the website I used which is GamerGeeks to generate this please tell me.)

Video: https://drive.google.com/file/d/1I3D3VKD1dAlZJuhBNcXZ7q_m7iaUd-yK/view?usp=share_link