@atarilinux The cp error is normal and happens on all builds, the actual problem is the last one. From my understanding based on an older discussion in the porting telegram group, the retrofitted partition is used for older devices which didn't have the new super partition. However, it shouldn't be impossible to get it working, as others got their device booting, mounting the android partitions is necessary only for getting the android container running.
Anyways, more experienced people are active on the telegram group, so you may want to ask them.