Ubuntu 20 LTS, install evince via snap, but hyperlinks not correctly displayed in the pop-up window (the window is empty)

while I successfully installed evince, via snap for Ubuntu 16.04 (see https://unix.stackexchange.com/questions/755478/ubuntu-16-04-install-evince-via-snap-but-no-service-via-dbus?noredirect=1#comment1438828_755478) I run into a problem when I try to do the same for a friend using Ubuntu 20.04. The installed works as expected, but when I open evince, via /snap/bin/evince and then a pdf file that contains hyperrefs the pop-up window pops up as it does in my Ubuntu 16.04, but the pop-up window is **empty** The message in the command line is

infinite surface is not supported.

I have no idea what this is supposed to mean. any help is strongly appreciated. Uwe Brauer