Single post author box profile image not shown

I have created one hook for author box in single post. but only image not display
code is i have added is below

<div class="author-box">
  <div class="avatar"><?php echo get_avatar( get_the_author_meta( 'ID' ));?></div>
    <h2 class="author-title"><?php printf( get_the_author_meta( 'display_name') );?></h2>
    <div class="author-summary">
    <p class="author-description"><?php echo wp_kses( get_the_author_meta( 'description' ), null ); ?></p>
  </div>
</div>

error image is https://prnt.sc/qlxrmk