Can anyone help me download High Sierra? Please???

I'm trying to download High Sierra on an Early 2009 Mac Mini 3,1 I've purchased. Dosdudes website says this Mini should work. However, I keep getting this message when I try to launch the High Sierra patcher https://imgur.com/a/hRDDvhm Any idea what to do next? I'm stuck and kinda been putting a lot of money into this project. Please help