Create Template page to show all posts with pagination
STEP 1. Upload wordpress simple pagination plugin and activete it (https://wordpress.org/plugins/simple-pagination/)
STEP 2. Copy below code as a template page.
<?php
/*
* Template name: All Posts page
*/
?>
<?php get_header();?>
<div class="pop_cause all_cause">
<h4>All Posts</h4>
<?php
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1; ?>
<?php $temp = $wp_query;
$wp_query= null;
$wp_query = new WP_Query();
$wp_query->query('posts_per_page=20&post_type=project'.'&paged='.$paged);
?>
<?php while ($wp_query->have_posts()) : $wp_query->the_post(); ?>
<h5><?php the_title();?></h5>
<?php endwhile; ?>
<?php if(function_exists('wp_simple_pagination')) { wp_simple_pagination(); } ?> //This function is use to show pagination and is exist in Simple Pagination Plugin
<?php $wp_query = null; $wp_query = $temp;?>
</div>
<?php get_footer(); ?>
