The Problem of Hibernate in Fedora

Hello Everyone
I know the Hibernate is disabled in Fedora as default
But how can I enable it again?
my RAM is 4GB and my Swap partition is 8.6GB
And there is /dev/zram0 in /dev/ folder.
But if I enter following code in Terminal there is a problem like:

[root@localhost ~]# systemctl hibernate
Failed to hibernate system via logind: Not enough swap space for hibernation

This might give you a idea why hibernation is not active in Fedora: (hibernation status)