Yes, there's an issue with the latest update.
You can manually fix it by mounting the SD card on another computer and creating a symlink at
/dtb/allwinner/allwinner
pointing to
/boot/dtb/allwinner
so it will look like this:
user@orangepipc2:/dtb/allwinner$ pwd
/dtb/allwinner
user@orangepipc2:/dtb/allwinner$ ls -lah
total 8.0K
drwxr-xr-x 2 root root 4.0K Aug 24 17:00 .
drwxr-xr-x 3 root root 4.0K Aug 24 17:00 ..
lrwxrwxrwx 1 root root 19 Aug 24 17:00 allwinner -> /boot/dtb/allwinner