The issue is being caused by this page below. hidden link
As you can see it has the same slug of Blogs, which is why you aren't able to access the archive page for your blog. Is this page going to be used to display your blog listing ? If so then you can't have the slug for the page and the custom post type being the same as wordpress won't know if you want the blog page or the blog archive.
But now the individual pages are showing blogs hidden link
Did you mean, we can not have both the main page and the individual page as 'blog' that they cannot be the same?
That is correct. The reason is because you are using a dedicated page for the blogs listing rather than using the default blog archive page.
In order to truly only have Blog as the slug, you will need to remove this page hidden link
Then create a custom archive for the blog hidden link
That is if you want to customize how the default blog archive page will look.
As explained earlier it is not possible to set the Post type slug and a dedicated page slug as the same slugs because wordpress won't know which page is which. Because the archive and the page will have the same base slug.
Please let me know if this clears up the issue for you.