Fortigate 7.0.15 won't open on gns3

I'm working on gns3 and I wanted to use the Fortigate 7.0.15 .I installed it and tried to open it but nothing shows it keeps as the picture shows with no result. I used to use the 7.4.4 and it worked but the 7.0.15 and the 7.2.8 didn't