Most likely you need to add nodes to the .conf file for successful synchronization - https://explorer.dunduck.com/network "Add Nodes" tab. This is a typical problem for DASH/BTC cli-wallets clones. Although I don’t understand why you need this project, unless for educational purposes or for the future - the first block was found almost 2 months ago, there are more profitable (already traded on exchanges) CPU-mined coins. I don’t want to say anything bad about DunDuck, but I think that at best it will only be listed on XeggeX.