author.php is breaking my theme

hi all
i have followed the tutorial to create the author.php so that i can display author’s articles on a author’s template. the tutorial pretty much prvided the codes , but it does not work well inside my theme. any help your be greatly appreciated.

here is the messed up page: https://palestrasespiritas.org/rje/?author=2

and here is the author.php code i am using for that page:

?php get_header();??>
<div id=”content” class=”narrowcolumn”>
<!– This sets the $curauth variable –>
<?php
if(isset($_GET[‘author_name’]))?:
$curauth = get_userdatabylogin($author_name);
else?:
$curauth = get_userdata(intval($author));
endif;
?>

<h2>Posts by <?php echo $curauth->nickname;??>:</h2>

<!– The Loop –>
<?php if ( have_posts() )?: while ( have_posts() )?: the_post();??>
• ” rel=”bookmark” title=”Permanent Link: <?php the_title();??>”>
  <?php the_title();??>,
  <?php the_time(‘d M Y’);??> in <?php the_category(‘&’);?>

<?php endwhile; else:??>
<?php _e(‘No posts by this author.’);??>

<?php endif;??>
<!– End Loop –>

</div>
<?php get_sidebar();??>
<?php get_footer();??>