Hi
The cause maybe by your host. Please contact to your host provider, they will fix these values. Here're requirements for KuteShop.
Before you begin the install, checking to ensure that you have the minimum requirements for KuteShop is WordPress 4.4.0 or highter, PHP 5.4 or highter and MySQL 5.4 or highter. Recommended PHP Configuration Limits
Many issues that you may run into such as; white screen, demo content fails when importing, empty page content with Fusion Builder and other similar issues are all related to low PHP configuration limits. The solution is to increase the PHP limits. You can do this on your own, or contact your web host and ask them to increase those limits to a minimum as follows:
max_execution_time 180
memory_limit 256M
post_max_size 64M
upload_max_filesize 64M
Please fix and re-install your theme again. If it does not work, you have to provide your Cpanel accounts because i would like to check your host and install this theme for you.
Regards,