I just tried to do an auto-update of my WP installation. The system reported the update went OK.
So I then did an auto-update of two very comoon plugins. That too seemd to go OK.
But at the end, I got the following error mesages
Warning: Unknown: open(/tmp/sess_1aef7a0f3c1d20efef4fbc2b534a0bc9, O_RDWR) failed: Permission denied (13) in Unknown on line 0
Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
and every Post was gone from my site.
Fortunately, I had made a full backup before startng. So I was able to restore.
But my WP is still out o date. I can't address that until I fix whatever is generating the error msgs and wiping out the Posts.
Anyone have a suggestion?