/ Fatal error: Uncaught ValueError: max(): Argument #1 ($value) must contain at least one element in /var/www/html/ebook_2020/index.php:615
Stack trace:
#0 /var/www/html/ebook_2020/index.php(615): max()
#1 {main}
thrown in /var/www/html/ebook_2020/index.php on line 615