Hello,
I have the exact same problem “no configuration method succeeded” with a Lenovo Laptop 20VE series
this is a realtek 8168 nic.
I tried to change the ipxe.efi to snponly.efi and it is working fine.
Since I don’t know what are the differences between ipxe.efi and snponly.efi. I’m going to stay on snponly.efi.
I didn’t try realtek.efi since this snponly is working for me.
Thank you for your help 