Tatsu Portfolio doesn't show tumbnails while Portfolio Carousel does


I’m working on a website needing a standard portfolio. As with my first project, I want to use Tatsu for this. When using the ‘Portfolio’ tile, it does not show the thumbnails, though I can click om them which still opens the specific portfolio page. See here: https://imgur.com/P9sD0gX

While I can’t print screen the cursor, in the bottom left corner it does show that the tumbnail/link is practically there, it is just not visible.

However, when I use the Tatsu tile ‘Portfolio Carousel’ the thumbnails do show up. No other changes are made.

Could anyone help me with this? Tried a lot of options - also comparing it to the other project - but can seem to find it out.