Hello,
It appears there has been a misunderstanding, and we are here to clarify the situation once again. Currently, posts are not being displayed on your blog page, regardless of the theme you are using. This issue is not related to our theme. To resolve this, please contact WordPress support. Once the issue is addressed, posts should display on your blog regardless of the theme used.
With our theme, you should be able to achieve the results as seen in our demo. Currently, the posts are not showing at all, and the cause is not related to our theme. As the support team for the theme, we are unable to assist with problems not caused by our theme.
We hope this clarifies the situation.
Best Regards,
The 8Theme Team