The UA Psionic Soul Sorcerer has the following Psionic Talent option:
Psychic Sorcery. When you cast a spell, you can use your mind to form it, rather than relying on words, gestures, and materials. To do so, roll your Psionic Talent die. The spell then requires no verbal component, and if you rolled the level of the spell or higher, the spell doesn’t require somatic or material components either.
This strikes me as confusing due to how the player's handbook describes spell components
A spell's components are the physical requirements you must meet in order to cast it. Each spell's description indicates whether it requires verbal (V), somatic (S), or material (M) components. If you can't provide one or more of a spell's components, you are unable to cast the spell
I had assumed that you needed to be able to provide the components before attempting to cast the spell, but the wording on the subtle spell metamagic begs to differ
When you cast a spell, you can spend 1 sorcery point to cast it without any somatic or verbal components.
According to This Answer this metamagic allows you to cast it without being able to provide the components if you cast it using the subtle spell metamagic. However, comparing this to the UA we see a problem. The psychic sorcery ability activates at the same time, but isn't guaranteed to make the spell castable necessarily, so that brings me to my question
Can you attempt to cast a spell without having the needed components by using this psionic talent option, and if you don't succeed on the roll and find yourself needing to provide components that you can't provide, what happens to the casting?
(Note additionally that if you cast a lv 1 spell or a cantrip it's functionally guaranteed to succeed by not from a rules perspective if that matters to the answer)