Normally, you can use this way to import the Education LMS (Pro) theme:

http://docs.filathemes.com/education-lms/#demo-data

Or this way:

https://wordpress.org/support/topic/import-demo-data-5/

If it still does not work, please use this way:

• Download the Education LMS installation here: https://drive.google.com/open?id=1JtkcS6b48tkXvXB5EfsjtBXZ8hA3NDy_

• Download the SQL file: https://drive.google.com/open?id=1xYwy8Qdn3OgFVOOSeC8yV6fyAVhDv_pH

Steps:

• Download the education-lms.zip from link above, upload it to your server or localhost then extract ZIP file.
• Go to phpMyadmin, import SQL file. Remember to delete old tables first.
• Open the wp config file, change the database name, username, password. Do the following here.
• Access phpMyadmin again, find wp_options table and replace the home_url & site_url with your domain. See here.
• Find wp_users table, replace admin email with your one. Then go to WP Login page to reset the password.
• Install the Better Search Replace plugin to replace all demo link with your URL.

That’s all. 

Thanks for using our theme!