Please make sure you have fullfilled the following Requirements
WordPress 5.8 or higher version.
PHP Version 7.4.0 or Upper . ( 8.0 recommended )
MySQL 5.6 or greater.
It is also recommended to setup your php limit to avoid the common issues during the plugin installation and demo import.
memory_limit 256M
max_execution_time 180
post_max_size 64M
upload_max_filesize 64M
max_input_time = 120
max_input_vars = 10000