Could you please try to install it on some default WordPress themes like TwentyTwenty or WooCommerce Storefront to understand is it our theme issue or not?
When I try to install the plugin, I see the 500 error (https://take.ms/R7QXWP) . 500 Internal Error is a generic error and says about some issue on the server and can be caused by different things. Anyway, to understand its nature you need to see your server error logs or enable PHP error display on the website. If you can’t do this, you need to contact your hosting provider for help in this question. Here is an article that may help you understand the error better http://www.wpbeginner.com/wp-tutorials/how-to-fix-the-internal-server-error-in-wordpress/