Xfce Crashed, Can't Get Toolbars Back

[B J]

I'm running FreeBSD 11.2 with Xfce on a laptop.  For some reason, the
desktop crashed and I can't get the toolbars back.

I booted the machine, logged in under my account, and I got messages
concerning the following:

serverauth.812 does not exist

.Xauthority not writable

I haven't the foggiest what that means and I'm wondering just how I'm going
to get Xfce working again without having to do a clean re-installation.

BTW, I haven't had the time to upgrade to 12 on that machine yet.

Any ideas or suggestions?  Thank you.

B. M. Jatzeck