Can't see preview of blog pages that is scheduled

I write blog posts in advance and I put them on schedule, but I want to see the preview and how the blog posts look without publishing them yet to my front page.

But when I try to preview the blog post it says ‘You Do Not Have Permission to Preview Drafts‘ or I get: Oops! That page can’t be found

It looks like nothing was found at this location. Maybe try the search below?

How is this possible? I want to be able to preview my posts before actually publishing them? (When I publish the post, I can view the posts, check it out and do the changes if I want them, I don’t want to do that publicly I want to do that with the draft)

Can someone please help me. My blog is https://www.fireofprometheus.com

Thanks you so much,

Kind regards,

Filip