Problem with the Mystique theme. Help needed.

I’m not sure how to explain this, I’ve looked for solutions for it and can’t find how to fix it. So, I’m here. I’m using the Mystique theme, it was working fine up until I updated it to version 2.4.2. And since the update, the theme isn’t displaying correctly. Where the color sections should be, there’s nothing. And where the RSS and Twitter buttons at the top are supposed to be, there’s nothing. I can’t figure out how to fix this. I’ve deleted the theme and reinstalled it several times. And it still shows this way.

Can anyone please help me fix this so it displays right?

My site is here: https://rambling-theory.com/