Auto-mount of shared folders stopped working when Ubuntu-LTS-18 upgraded

[sundialsvc4]

Running VirtualBox latest (5.2.19) I only updated Ubuntu to LTS-18 and now the shared folders won't auto-mount even though I have specified in the appropriate VirtualBox settings-panel that they should do so.

I can mount these shares using sudo mount ... and I'm also reasonably sure that I can use "/etc/fstab," but I don't think that I should have to do so.

No(!) changes were made other than to update Ubuntu. Permissions/Groups also known not to be an issue.

Also – I reinstalled the extensions pack both from the Linux command-line side and by running the installer on the Oracle web-site. Neither have had any effect on the problem.

[socratis]

I've removed your duplicate post from a similar thread. Since you opened your own thread, there's no point in waking up old, [Solved] threads, it's confusing the other thread...

No(!) changes were made other than to update Ubuntu.

Really? And you consider that to be a small, or actually "No(!)" change?

Re-install the GAs. Check the output (post it) for errors. See if it directs you to read another installation log.