Server Requirements

PHP version 5.6.20 or latest version
MySQL version 5.6 or greater / MariaDB version 10.0 or greater
WP Memory limit of 128 MB or greater 
max_execution_time 360 (This needs to be increased if your server is slow and cannot import data.)
PHP Post Max Size: 128 MB or greater
Upload File Size: 128 MB
PHP Time Limit: 360
WordPress version 4.7 or greater.