Some users have reported seeing an error message saying "PHP Fatal error:  Call to undefined function mb_detect_encoding() in …\simplerisk\includes\HighchartsPHP\HighchartOption.php" in their error log when going to the reporting dashboard page.  You will see this error message when the PHP mbstring extension is not enabled and you can check if it is enabled with the "php -m" command.  To add it, if it is not enabled, you can either compile it into PHP with the "--enable-mbstring" flag, use "apt-get install php5-mbstring" in a Debian environment, use "yum install php-mbstring" in a Redhat environment, or add "extension=php_mbstring.dll" to the php.ini file in a Windows environment.