get_the_author_meta is not working in wordpress - php

Question

here is the code
<?php
/**
* Display detail author of current post
* Use in single post
*
* #since 1.0
*/
?>
<div class="post-author">
<div class="author-img">
<?php if( function_exists('get_simple_local_avatar') ){
if( get_simple_local_avatar( get_the_author_meta( 'ID' ) ) ){
echo get_simple_local_avatar( get_the_author_meta( 'ID' ), '100' );
} else {
echo get_avatar( get_the_author_meta( 'email' ), '100' );
}
} else {
echo get_avatar( get_the_author_meta( 'email' ), '100' );
}
?>
</div>
<div class="author-content">
<h5><?php the_author_posts_link(); ?></h5>
<p><?php the_author_meta( 'description' ); ?></p
<br>
<?php
$bool=0;
if ( get_the_author_meta( 'user_url' ) )
{
$bool = 1;
}
if ( get_the_author_meta( 'facebook' ) )
{
$bool = 1;
}
if ( get_the_author_meta( 'twitter' ) )
{
$bool = 1;
}
if ( get_the_author_meta( 'instagram' ) )
{
$bool = 1;
}
if ( get_the_author_meta( 'pinterest' ) )
{
$bool = 1;
}
if ( get_the_author_meta( 'tumblr' ) )
{
$bool = 1;
}
if ( get_the_author_meta( 'email' ) && get_theme_mod( 'penci_post_author_email' ) )
{
$bool = 1;
}
if($bool==1){
if (get_locale()=='ar') { ?>
<h5 class="connect_with_ar">تواصل مع <?php the_author_posts_link(); ?></h5>
<br>
<?php } else {?>
<h5 class="connect_with">Connect With <?php the_author_posts_link(); ?></h5>
<br>
<?php } } ?>
<?php if ( get_the_author_meta( 'user_url' ) ) : ?>
<a target="_blank" class="author-social" href="<?php the_author_meta( 'user_url'); ?>"><?php penci_fawesome_icon('fas fa-globe'); ?></a>
<?php endif; ?>
<?php if ( get_the_author_meta( 'facebook' ) ) : ?>
<a target="_blank" class="author-social" href="http://facebook.com/<?php echo esc_attr( the_author_meta( 'facebook' ) ); ?>"><?php penci_fawesome_icon('fab fa-facebook-f'); ?></a>
<?php endif; ?>
<?php if ( get_the_author_meta( 'twitter' ) ) : ?>
<a target="_blank" class="author-social" href="http://twitter.com/<?php echo esc_attr( the_author_meta( 'twitter' ) ); ?>"><?php penci_fawesome_icon('fab fa-twitter'); ?></a>
<?php endif; ?>
<?php if ( get_the_author_meta( 'instagram' ) ) : ?>
<a target="_blank" class="author-social" href="http://instagram.com/<?php echo esc_attr( the_author_meta( 'instagram' ) ); ?>"><?php penci_fawesome_icon('fab fa-instagram'); ?></a>
<?php endif; ?>
<?php if ( get_the_author_meta( 'pinterest' ) ) : ?>
<a target="_blank" class="author-social" href="http://pinterest.com/<?php echo esc_attr( the_author_meta( 'pinterest' ) ); ?>"><?php penci_fawesome_icon('fab fa-pinterest'); ?></a>
<?php endif; ?>
<?php if ( get_the_author_meta( 'tumblr' ) ) : ?>
<a target="_blank" class="author-social" href="http://<?php echo esc_attr( the_author_meta( 'tumblr' ) ); ?>.tumblr.com/"><?php penci_fawesome_icon('fab fa-tumblr'); ?></a>
<?php endif; ?>
<?php if ( get_the_author_meta( 'email' ) && get_theme_mod( 'penci_post_author_email' ) ) : ?>
<a class="author-social" href="mailto:<?php echo esc_attr( the_author_meta( 'email' ) ); ?>"><?php penci_fawesome_icon('fas fa-envelope'); ?></a>
<?php endif; ?>
</div>
</div>
this code working for old users
but it does not work with new users
EDIT
all the plugins that I am using in the website are
EDIT 2

Answer 1

if(isset($_GET['author_name'])){
$curauth = get_user_by('slug', $author_name);
}
else{
$curauth = get_userdata(intval($author));
}
Put this code in author.php. Then change the relevant places.
For example.
printf( wp_kses ( __( '<h1 class="page-title">%s</h1>', 'soledad' ), penci_allow_html() ), get_the_author() );
This line 61. Soledad theme -> author.php
You can put
$ curauth-> first_name instead of "get_the_author ()"
$curauth->user_email;
$curauth->first_name;
$curauth->last_name;
This way you can get all the user's variables.