OS 1.9.0 install failed, gives dead support link

It was stuck in a normal boot loop. It showed the standard Magic Leap logo with the bar under it moving left and right. So I put it back into fast boot using volume button and power. Now I cannot seem to get it out anymore, and my computer (or any else) does not recognize it anymore after a reboot of my computer. It looks like it boots normally after your prescribed procedure, but it goes back to fast boot again. Is there some magic key combination to get it alive again? The hub nor Windows does recognize it anymore. This is most unfortunate

It looks very much like this. Boot loopback, even after fastboot erase userdata and flashall_amd.bat

I don't understand. It worked fine until the update