GI_ICON_DEFAULT_IDENT

Hi All,

I am facing below error when i try to upload a test case.

Constant GI_ICON_DEFAULT_IDENT already defined [C:\inetpub\wwwroot\testrail\sys\helpers\icons.php:4] (at ErrorHandler::error)

TestRail version    2.7.1.2102
MS Server 2008 R2
IIS7.5 + PHP

Hope some one can enlighten me with this error.