Error messages are intended to be used for debugging purposes, however they can include sensitive information (such as file paths). For security, error details are only shown if either of the following are true:
<configuration>
<system.web>
...
</system.web>
<appSettings>
<add key="Keyoti-SearchEngine-ShowDetailedErrors" value="true"/>
</appSettings>
If errors are arising outside of localhost, temporarily enable show detailed errors to obtain more information.