This is more like a server problem, it seems like your server is very old. WordPress requirements change over time to stay up to date and provide a fast and stable experience and also more features.
As of this post, the WordPress server (minimum) requirements are the following:
PHP 5.2.4+
MySQL 5.0+
Recommended is:
PHP version 7.2 or greater.
MySQL version 5.6 or greater OR MariaDB version 10.0 or greater.
HTTPS support
See documentation: https://wordpress.org/about/requirements/