If you encounter any problem it’s important to find out the source of it. To do this disable any other plugins and use the standard theme. If the error is solved reactivate the theme and plugins after another to find out which one is causing it. If it’s a common plugin report it in the forum.

If it still persists it’s most likely a bug or misconfiguration of the plugin or sometimes a server setting. Report it in the forum. To find out if it’s a server side problem you can install a local XAMPP server with default configurations and test your website on it as easyReservations gets developed on it.