SASS syntax, pseudo-element :hover + class?

Question

Sass

I don't understand why the combination
& a
&:hover + .increase doesn't work.
I'm trying to change the display: none value of the block with the class increase .
however, for some reason, when I add "+.increase" the hover also stops working.
what's wrong?

The goal of the whole action, when hovering over a block with an image, is to superimpose on another color with a cross....

Answer 1

try to remove the "&" sign before the "a" tag (line 28)
and "probably" on the 32nd line there is also an extra ampersand
upd
block .increase is "inside" the "a" tag, so the neighbor selector will not work ("+" selector) - must be removed
&:hover .increase