NOT SURE HOW TO REGENERATE IMAGE

https://gamewidth.net/category/tekken7/

Uploading images after while.

This is first image second image is supposed to be before i just uploaded the first image.

this image size is something with wrong. 

 <div class="widget1">
      <!--<div class="carousel" data-flickity='{ "groupCells": true }'>-->
      <h2 class="side-title">Popular Post</h2>
      <?php $args = array(
          'posts_per_page'  => 2,
          'orderby'       => 'comment_count',
        );
        $my_query = new WP_Query( $args );
      if ( $my_query->have_posts() ) : /** サブループ */ ?>
      <!--<div class="carousel-cell"></div>-->
      <ul id="sidebar-recent-posts" class="sidebar-posts">
        <?php while ( $my_query->have_posts() ) : $my_query->the_post(); ?>
        <li class="clearfix">
          <div class="sidebar-recent-posts-title">
            <h3>
              <a href="<?php the_permalink(); ?>" class="badge badge-primary">
                <?php the_title(); //Bootstrap色 Bootstrap見出しを大きくh4?> </a>
            </h3>
          </div>
          <p class="sidebar-thumbnail-box">
            <a href="<?php the_permalink(); ?>" title="「<?php the_title(); ?>」Read">
              <?php /** サイドバーアイキャッチ画像 Square 100 Size */
                  if ( has_post_thumbnail() ) :
                    /*the_post_thumbnail( array( 100, 100 ) );*/
                    the_post_thumbnail('thumbnail');
                  else : ?> <img src="<?php echo get_template_directory_uri(); ?>/images/noimage.gif" alt="" />
              <?php endif; ?>
              <p class="post-meta"> <svg class="icon icon-clock">

                                <use xlink:href="#icon-clock">

                                  <span class="post-date"><?php the_time( get_option( 'date_format' ) ); ?></span>

                                </use>

                              </svg> <svg class="icon icon-price-tags">

                                        <use xlink:href="#icon-price-tags">

                                        
                                          <span class="category"><!--Category--><?php the_category( ', ' ) ?></span>
                                      
                                        </use>
                                        
                                      </svg>
                <!--<p class="sidebar-comment-num"><?php //comments_popup_link( 'Comment : 0', 'Comment : 1', 'Comments : %' ); ?></p>--><span class="sidebar-comment-num">
                            <?php comments_popup_link( '<i class="far fa-comments"></i> : 0', '<i class="far fa-comments"></i> : 1', '<i class="far fa-comments"></i> : %' ); ?>
                          </span> </p>
            </a>
            <?php //the_excerpt(); /** 抜粋（CHAPTER 14）*/
                        /** Readリンク */ ?>
            <?php echo dess_get_excerpt(150); ?>
            <p class="more-link"> <a href="<?php the_permalink(); ?>" title="「<?php the_title(); ?>」Read"><span class="badge badge-success">Read &raquo;</span></a> </p>
            </a>
          </p>
        </li>
        <?php endwhile; ?> </ul>
    </div>
    <!--carousel-cell-->
    <?php endif; /** サブループ終了 */
      wp_reset_postdata(); ?>