Make sure you have the following features to have a smooth WordPress and theme experience.
Using the latest version of WordPress.
PHP version 7.4 or greater
MySQL version 5.7 or greater OR MariaDB version 10.2 or greater
HTTPS support.
To check the minimum requirements to run WordPress.
The developing web world always wants to be up to date. WordPress may also works with PHP 5.6.0+ and MySQL 5.0+, but you may experience potential problems. Because these versions are now at the end of their life.
Many WordPress issues that you may run into such as: PHP errors, demo import fails, empty page content and other similar issues are all related with low PHP configuration limits. The solution is to increase the PHP limits. You can do this on your own or contact with your web hosting company.
max_execution_time 900
memory_limit 512M
post_max_size 256M
upload_max_filesize 256M