Pagination Not Working on Category.php page

Try this code, not much different from your’s but with proper nesting. Let me know if that works.

<?php if ( have_posts() ) :
    while ( have_posts() ) : the_post(); ?>

    <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>

        <a href="https://wordpress.stackexchange.com/questions/212425/<?php the_permalink() ?>" class="noborder"><?php if ( has_post_thumbnail() ) { the_post_thumbnail('thumbnail'); } ?></a>
        <a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" rel="bookmark"><?php the_title(); ?></a>

            <section class="entry-content">
                <?php   $content = get_the_content();
                        $content = strip_tags($content);
                        echo substr($content, 0, 250) . '...';
                ?>
                <a href="https://wordpress.stackexchange.com/questions/212425/<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>" class="button">Full Post</a>
            </section>

    </article>

    <?php endwhile; ?>
        <nav>
            <div class="6u"><?php next_posts_link(sprintf( __( '%s', 'blankslate' ), '<span class="button">&larr;  Older Posts</span>' ) ) ?>
            <div class="6u"><?php previous_posts_link(sprintf( __( '%s', 'blankslate' ), '<span class="button">&rarr; </span>' ) ) ?></div>
        </nav>          

<?php else : ?>

    <p><?php _e( 'Sorry, no posts matched your criteria.' ); ?></p>

<?php endif; ?>

Related Posts:

  1. Display posts from the same category using next/previous post link
  2. How can I create a category landing page followed by pages of posts?
  3. Display all posts from all categories with pagination
  4. Show Previous/Next Posts navigation only inside the same category
  5. Page navigation within a category
  6. Show posts of one category only with Custom Taxonomy on single.php
  7. Pagination on child category returns 404
  8. Disable pagination only for specific category
  9. Archive pagination causing 404 with permalinks structure
  10. Custom category template pagination problem
  11. How can i call an article from each category and still paginate properly?
  12. Show posts of category in a page
  13. Force category-slug.php to show page, even if it doesn’t exist
  14. 3 Columns, 3 Categories, One Archive, and Pagination
  15. Broken category pagination
  16. ?cat=-1 Indexed Versions Of Homepage
  17. Pagination for category slug returns 404 when page >= 2
  18. Pagination not visible on woocommerce’s category page
  19. Pagination is not working properly in Product Category/Tag pages
  20. Restoring default article pagination on archives – Removing custom limits
  21. The default code for “posts_nav_link” on category.php isn’t working
  22. Why category.php throw 404 in wordpress while calling paginate_links()?
  23. Paging not working in category.php
  24. How do I toggle pagination on/off in search results and category listings via a link?
  25. Multiple Loops on category.php with pagination on last loop
  26. Custom post and category template pagination problem
  27. How to make the link to the category for a post go to corresponding page number in archive?
  28. Category archives with monthly pagination
  29. category pagination got broken suddenly
  30. Pagination for ajax category filter
  31. Category template with pagination returns 404 on next pages
  32. How to display numbered pages in a category
  33. WordPress alphabetical A-Z custom post type post result display
  34. How to show 1-5 of X Total Results
  35. Pagination on category.php and tag.php not working
  36. How to do paging in the loop?
  37. Pagination for query_posts();
  38. Having problems with paging
  39. Pagination doesn’t work on multiple categories
  40. Pagination breaks on child-categories, works fine on parent-category
  41. Pagination for a category
  42. Can I define multiple paginations on a single page?
  43. Conditional category query breaking?
  44. Category pagination not working
  45. How do I remove pagination from just some Categories?
  46. Problem with pagination block in Gutenberg
  47. Show the number of the post
  48. pagination 404 error, same slug home and categories
  49. Pagination for custom categories template
  50. Remove WP Core canonical for category pagination
  51. Unable to create pagination for Category.php
  52. Pagination does not work with query_posts()
  53. “Next posts” of a category do not call category.php
  54. WordPress pagination based on category
  55. How to add Pagination to foreach loop to page
  56. Removin /page/2 from pagination
  57. WordPress pagination not working because of subcategory
  58. Loop within category’s posts
  59. Paginations in Category Page Leads to Sample Pages
  60. Category foreach Paging
  61. Transfering static site to wordpress and retaining category by month paginations
  62. WordPress Numeric Pagination with Query String [duplicate]
  63. date.php shows all posts. how to fix it?
  64. wordpress category.php query for featured news item, broken pagination and repeating posts
  65. Paginating a list of all posts collected by category titles
  66. Paginate WordPress Category Pages
  67. Using pagination with multiple loops causes it to break
  68. Showing one post from each category, paged?
  69. Why Pagination is not working on Category.php
  70. Can i know if it is Category first page or 5th?
  71. Exclude posts from certain category breaks custom pagination
  72. Category pagination not working in category.php please help me
  73. i want to add pagination list of categories
  74. Link to page in category
  75. How can I implement pagination on custom category page?
  76. wordpress category rewrite rule with pagination
  77. Retrieve Product category ‘NAME’ by product category ID – WooCommerce?
  78. Filter front page posts by category
  79. How to get the url to tag & category base set by the user?
  80. Root level category, tag, author and archive pages to work
  81. Get a variable from object in array [closed]
  82. Category slug $_SERVER[‘REQUEST_URI’];
  83. wp_dropdown_categories and custom taxonomy + custom post type
  84. Get only one of the current categories
  85. Show Available Taxonomy List with Current Category
  86. Create menu / submenu from category subcategory and posts
  87. Make parent category an optgroup
  88. On the Blogpost I have categories showing, is there a way to exclude a catgegory like ‘Media’?
  89. Posts from a category on homepage with category archieves page default css
  90. How to use wp_list_categories with plugin category?
  91. Theme modification for custom category menus
  92. Custom css per category and per single post belong in each category
  93. Subcategory is displayed before Parent Category
  94. Custom Loop with certain number of one category
  95. “Special” category is displayed in all categories or show parent category on sub category
  96. How to list all categories a post is in, but exclude current post´s category on single post page
  97. Get only children category name
  98. No results found for second level category
  99. WP_query exclude a category unless it has more than one catagory
  100. Trying to WP_Query a category