Unable to connect Categories to Projects; Relevant projects not displayed when Category name is clicked

Here is my public share link: Webflow - Athiya Rastogi

Scroll to the middle of the page.

When I click on the category ‘All’, ‘Data Science’, ‘Product Design’, it takes me to a new page instead of linking the projects related to each category.
How do I link my projects to the categories so the projects linked to the categories get displayed, when the category is clicked?