The beta-scripts are installing the newest mod-host/mod-ui from moddevices. Both are not running out of the box. I think this may be the problem.
Try to run
rm -rf /zynthian/zynthian-sw/mod-host /zynthian/zynthian-sw/mod-ui
/zynthian/zynthian-recipe/recipe/zynthian-mod-ui.sh
/zynthian/zynthian-recipe/recipe/zynthian-mod-host.sh
I will fix this also in the beta scripts…
Regards, Holger