I have found something in your
/opt/bitnami/apache2/logs/error_log. It seems there is an error in line 101 of your
/opt/bitnami/apps/wordpress/htdocs/wp-config.php file. The line looks like:
** Absolute path to the WordPress directory. */
However, since it is a comment, you should add a
/ at the beginning:
/** Absolute path to the WordPress directory. */
I hope it helps.