Error with the plugin

Hello,

I received the following email after I posted a review, also the review was made two times, here is a link to the review – https://puzzlesprint.com/puzzles-print-reviews

What could be the problem?

The email states the following, that there is an error with the plugin:

WordPress has a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.
In this case, WordPress caught an error with one of your plugins, WooCommerce Photo Reviews Premium.
First, visit your website (https://puzzlesprint.com/) and check for any visible issues. Next, visit the page where the error was caught (https://puzzlesprint.com/wp-admin/admin.php?page=kt-wcpr-add-review) and check for any visible issues.
Please contact your host for assistance with investigating this issue further.
If your site appears broken and you can’t access your dashboard normally, WordPress now has a special “recovery mode”. This lets you safely login to your dashboard and investigate further.
https://puzzlesprint.com/wp-login.php?action=enter_recovery_mode