Comment 38 for bug 1897224

I installed the Groovy-proposed updates, including:
Package mutter:
p A 3.38.1-1ubuntu1 groovy 500
i A 3.38.1-2ubuntu1 100

Running a Snap results in the same error:
$ joplin-james-carroll.joplin
(joplin:40222): Gtk-WARNING **: 07:02:09.027: cannot open display: :0

$ chromium
[43799:43799:1123/070612.587261:ERROR:browser_main_loop.cc(1434)] Unable to open X display.