Increase the memory limit of your WordPress site can be done in several ways and you have to figure out, which one works for your current hosting.
In case you run into an issue, it might be necessary to produce some log entries in order to get more details about the cause of the problem.
You may run into the issue that your product boxes/tables are being displayed completely un-styled. This often happens after installing the plugin on a new site or updating it to a newer version.
Please ensure that your web hosting meets the following requirements: PHP 5.6 or newer MySQL 5.0.3 or newer WordPress 4.7.5...