Tags and categories don't link to the posts under that category or tag

my repo: nataliepjlin/up (github.com), original code is on master branch

Hi! I created pages for displaying categories and tags, and they can show the right amount of posts under them. However, neither these button nor the url(such as https://nataliepjlin.github.io/up/categories/actions/) can link to the posts under them. For example, the actions categories only have 1 post (aka /post-1/), but it will show all blog posts.
Is there any ways I can fix this problem? Thanks a lot!!!

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