I'm using a PHP script for my HTML files. Actually, it worked before but when I migrate to a new server, it's getting this error:
Notice: Array to string conversion in /www/branch/docroot/.example//index.php on line 2387
I'm checking related lines but I cannot see any error.
'<td><a href="?id=' . $html_id . '" class="text-decoration-none">' . $subject . '</a></td>' .
Also, my page is working with this error. How can I solve it?