Zoom 5.10 (and now 5.9) no longer works after today's update

[MR ZenWiz]

I approved the latest update for Xubuntu 22.04 this morning, and zoom
no longer works at all. It brings up the window outline and then
disappears.

I'm avoiding running an update on my 20.04 laptop for now where zoom
still works.

Any ideas of what's wrong or where to look? I check
/var/log/appport.log, which was the most recent log file update, and
it shows this:

ERROR: apport (pid 541069) Thu May 19 12:05:58 2022: executable:
/opt/zoom/zoom (command line "/opt/zoom/zoom --disable-gpu-sandbox")
ERROR: apport (pid 541069) Thu May 19 12:05:59 2022: gdbus call error:
Error: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name
org.gnome.SessionManager was not provided by any .service files

ERROR: apport (pid 541069) Thu May 19 12:05:59 2022: debug: session gdbus call:
ERROR: apport (pid 541069) Thu May 19 12:05:59 2022: this executable
already crashed 2 times, ignoring

(That was the last time I ran zoom with the disable-gpu-sandbox - in
desperation because without that option it still refuses to run, same
reason. I don't know what that means, and Google search results are
not helpful AFAICT.)

Here's my Graphics card info:

12:19 [admar at marbase:~] $ sudo lshw -c video
  *-display
       description: VGA compatible controller
       product: GP108 [GeForce GT 1030]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci at 0000:03:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:116 memory:fb000000-fbffffff
memory:d0000000-dfffffff memory:e0000000-e1ffffff
ioport:f000(size=128) memory:fc000000-fc07ffff
  *-graphics
       product: EFI VGA
       physical id: 1
       logical name: /dev/fb0
       capabilities: fb
       configuration: depth=32 resolution=2560,1440

Any help would be gratefully accepted.

Mark