Blog page layout

Please kindly assist with sydney theme or the WordPress settings i don’t know where the error is coming from.

When I go to my website

https://skilldigitalsolutions.com/ and click on “BLOG” The URL returns a page of a particular post on my blog page instead of all of the posts on the blog page. I click the URL will always return https://skilldigitalsolutions.com/blog-best-digital-marketing-agency-seo-consultant/ instead of https://skilldigitalsolutions.com/blog/ which will display all my blog posts. Please kindly assist

The page I need help with: [log in to see the link]