pgAdmin4 presents blank screen after login

I am reposting my yesterday's query as a separate thread per Dave's advise.  Please let me know if I should try to download and install the newer release that is targeted to Sept 19th.  Thanks!

Hi there,

pgAdmin4 acted up today when I start using it mid afternoon - I was presented a "blank" page after login (see image below).  We tried different browsers on different OS with the same issue.  Please kindly advise.

My server is Ubuntu 18.04 and here is the content of file "/etc/apt/sources.list.d/pgdg.list"

deb http://apt.postgresql.org/pub/repos/apt/ bionic-pgdg main

Bo