From time to time, when I switch interfaces, the interface is blank. Looking at the source, the appview div has been emptied. I'm on Chrome 87 and Firefox.
This is one way I'm able to replicate this, although I'm not sure if it will work for you.
- Open app.dative.ca, already logged into a server
- Go to Corpora > Browse
- Select a corpus
- Go to More Controls
- Select Browse Corpus.
- Go to Corpora > Browse
For me, this results in an empty appview div.