WL-WN570HA1 installation fails

hello,

bought recently a wl-wn570ha1 and followed the procedure on the device page. By doing that I installed first the kernel image (initramfs), then the sysupgrade. AFter reboot I end up again in initramfs mode. Then I followed the instructions from this thread: Wavlink WL-WN570HA1 stuck in initramfs mode - #11 by spyros2017

also no luck: after installing the patched sysupgrade from morpheus68, I end up with a device that is answering ping on 192.168.1.1 but no radios and no luci interface, no openwrt thus.
I can ssh into it.

Any ideas how to go further or what else can I try ?