New installation of nightly 29.04.2021. Imported pools from 21.02, Apps just activated (pool selection works ok). Official Scale Apps show correctly and seem to install as well.
Using UI on Firefox 88.0.
Top-right corner buttons do not work. Advanced settings do not open. Add new catalog does nothing. Launch Docker button (the blue one) does nothing. While official applications seem to install and run, they do not appear in the installed apps list.