To use Cliper WordPress theme you need to have a WordPress 4.0 (or higher version) site with PHP 5.6 or more and MySQL 5.0+ running on your hosting server. If you’ve already installed WordPress on your server and your site is up, that’s great. For help regarding WordPress installation, please see this WordPress Codex link.
Some more resources from WordPress Codex:
To increase upload file limit size and server execution time, please follow the article How to Increase the Maximum File Upload Size in WordPress (wpbeginner.com)
Example for htaccess file:
php_value upload_max_filesize 256M php_value post_max_size 256M php_value max_execution_time 3000 php_value max_input_time 3000
If your server is running with lightspeed server then follow this article Backup & Demo Content — Unyson Framework documentation
Example for lightspeed .htaccess file.
upload_max_filesize = 128M max_input_time = -1 post_max_size = 128M max_input_vars = 8000 max_execution_time = 3000