Anet a8 marlin 1.1.8

Please help i followed instructions but I'm getting errors please help. Currently my printer is running skynet3d and when I flash the firmware everything flash fine but now I want to upgrade the Marlin 1.1.8 and I followed all the instructions and I'm getting errors if anyone could please help me that would be great thank you If you would like to help me out please donate to help https://www.paypal.me/APRK Thank you