I suspect it is automatically hidden if not working/configured.
I would have said to try the command line (systemctl hibernate), but since you already see the error on boot it is obvious it will not work.
You can see the errors in the kernel buffer and from the current boot.
journalctl -b -p3 --no-pager
journalctl -k
This and some other useful commands i have collected here.
To me so far seems like a problem with the swap partition. This error was mentioned in several topics in the forum but i cannot remember the specifics.
Post the logs here we might get new ideas.