RELAX NG check kiwi file but got "Invalid sequence in interleave"

I am new for kiwi and obs.
I try to build a ISO file with OBS and kiwi, but it failed.

The log file: https://build.opensuse.org/build/home:qinka:branches:openSUSE:Templates:Images:15.3/images/x86_64/harley-suse/_log
and the kiwi file: https://build.opensuse.org/package/view_file/home:qinka:branches:openSUSE:Templates:Images:15.3/harley-suse/harley.kiwi