Denis-Carl Robidoux posted a comment on discussion Help

Hello, haven't got any news from that old project in a long time. There are a few reasons why this message would occur, these are standard issues with any xwindow software (all linux softwares with GUIs): - Your system does not have Xwindow installed - Your Xwindow is not running (you're using a command line only system) - You're trying to build it through ssh from another computer. - The environment variable DISPLAY is not defined for some other reasons. You could fix whichever reasons I mentioned...